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hekur
Questions and answers by
hekur
Questions (90)
Identify some places we have seen evidence of water in other places in the solar system.
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Summarize the three conditions that allow life to sustain itself on Earth.
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Compare Earth’s, Venus’s, and Mars’s ability to sustain life.
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mercury
Eliminating Conditions(s)
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Venus eliminating conditions
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the Black Sunday Dust Storm of April 14, 1935 relates to Texas during this era because…
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Dust storm in Amarillo, Texas. relates to Texas during this era because…
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The Works Progress Administration was always there to assist the unemployed. relates to Texas during this era because…
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Cotton weighing in Kaufman, Texas. relates to Texas during this era because…
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Works Progress Administration relates to Texas during this depression era because…
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what happened in the dust bowl; and why is it important
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78/100 as percent
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0.21 as fraction
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0.93% fraction
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1/2500 as a percent
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1/2500 as decimal
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0.0003 as fraction
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3 /10000 as percent
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Troposphere Surface area 4πr2
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Explain the environmental impact that weathering, erosion, anddeposition has had in the state of Texas.
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Explain the effect that human activity can have on groundwater andsurface water in a watershed.
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A factory is built next to a river that feeds directly into a lake. The factory takes water from the river and uses it in the
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Explain how the landfill might still have negative effects on the local watershed.
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How does a planet’s distance from the Sun affect the planet’s ability to support life?
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Describe three reasons why the Moon cannot support life compared to Earth.
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Describe three characteristics of the planet Earth that make it suitable for life. For each characteristic, include a
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Name and describe two human activities that have different negative effects on groundwater held in aquifers.
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Describe how decomposers enrich soil and help other organisms survive. Be sure to describe what is produced during decomposition
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Describe how nitrogen is cycled throughout living systems and the atmosphere. Your response should include the role of
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Explain what is meant by the term “cycling of matter within living systems.”
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Element
Matching Element Matching Group or Period? Shared Characteristics Calcium (Ca) Flourine (F) Iodine (I) Argon (Ar)
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vWhat are at least two shared characteristics of Calcium (Ca) and the matching element that you selected based on their
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Mendeleev organized his periodic table by ______ in the same way that today’s periodic table is organized by atomic number.
OPT
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The modern periodic table is different from Mendeleev’s in several ways. In which way are the two tables the same?
OPTIONS The
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Mendeleev’s Periodic Table lacked -
OPTIONS noble gases. chemical property trends. neutrons. atomic mass.
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How does the periodic table used today classify elements?
OPTIONS According to chemical properties alone. According to atomic
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The diagram shows a portion of the periodic table. Elements which were unknown during Mendeleev’s time have been removed.
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Look
Think Think about the arrangement of the Periodic Table and the information it provides. Write Explain how properties can be
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Element Atomic number Atomic radius (pm) Effective nuclear charge (Zeff)
Sodium 186 90 Magnesium 160 109 Aluminum 143 130 Silicon
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What are some benefits of using a smaller unit of measurement like the picometer?
¼
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How much larger is aluminum’s atomic radius than argon’s? Use scientific notation to provide your answer in meters.
¼
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Element Atomic Radius (pm) Atomic Radius (meters)
Aluminum 143 1.43 x 10-10m Magnesium 160 Silicon 111 Sulfur 100 Argon 94
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As you look at the periodic table of elements, what trend or pattern do you notice about the size of each element’s atomic
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The amount of energy that must be added to remove an electron from a neutral atom to give a cation (a positively charged ion) is
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Write an inequality statement that compares the atomic radii for each atom using the symbol < , > , or = in the blanks below.
Mg
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Explain the relationship between atomic radius and Zeff. Provide rationale for your response using data from the table and from
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Scenario:
Scenario A Mars Rover has collected and analyzed several samples from the surface of Mars and its atmosphere. NASA has
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Describe what happens to large molecules during digestion.
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How could point source pollution best be described?
OPTIONS Soap suds from washing a car flow into a storm drain. Water moves
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What could be an easy way to prevent non-point source pollution?
OPTIONS Let someone else wash your car. Keep businesses and
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What percentage of Earth’s water is NOT liquid, fresh water that is available for us to drink and use.
OPTIONS 99% 97% 3% 1%
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The lake near a small city has become polluted. One group blames the local factory for the pollution. The factory claims that
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A community is concerned that its river has become polluted. Analysis of water samples shows small amounts of over 20 different
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A circle has a radius of 4.5 centimeters. Which measurement is closest to the circumference of the circle in centimeters?
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A sundial has a circular base with a diameter of 90 feet as shown in the diagram.
90 feet. N. E. S. W. Which measurement is the
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The radius of circle S is half the radius of circle L. The radius of circle L is 8 millimeters.
Which measurement is closest to
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Use the ruler provided to measure the dimensions of the circle to the nearest centimeter. Which measurement is closest to the
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The diameter of circle X is 15 centimeters. The diameter of circle Y is 20 centimeters.
Which measurement is closest to the
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Use the ruler provided to measure the radius of the circle to the nearest half centimeter.
Which measurement is closest to the
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Simon is filling a cylindrical water dispenser that has a radius of 7 inches and a height of 20 inches. Which of these is the
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Simon is filling a cylindrical water dispenser that has a radius of 7 inches and a height of 20 inches. Which of these is the
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How does the scanner show that different materials have different chemical compositions?
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What property of matter is being scanned in each food?
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Other than scanning food to determine nutrition or scanning pills to determine type, what are some other uses you could predict
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Carbohydrates are found in many foods. What is the end result of the body’s use of a carbohydrate?
OPTIONS A carbohydrate is
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How will a saltine cracker start to taste if someone chews on it for five minutes?
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How will a saltine cracker start to taste if someone chews on it for five minutes?
OPTIONS very salty bitter sweet hot
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What does the word enzyme in paragraph 4 mean?
OPTIONS the glands which produce saliva in your mouth a substance that helps a
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What is the main focus of the passage?
OPTIONS A cracker will change as you chew it. Some molecules must be broken down to be
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List and describe the three subatomic particles that make up atoms.
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What are elements?
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Think about the definition of an atom.WriteDescribe the structure of an atom.Be sure to –Address the prompt, provide support,
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Characteristics of Subatomic Particles: Are negatively charged: CHOOSE ANSWER
Have the smallest mass of the subatomic particles:
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The root word “di” means “two,” so the word “diatomic” refers to _____.
OPTIONS forces within the atom a molecule
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In paragraph 2, attraction and repulsion refer to _____.
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How did Ernest Rutherford’s experiment relate to J.J. Thomson’s work?
OPTIONS Rutherford looked for magnetic fields, while
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Which scientist discovered the neutron and gave us the current basic model of the atom?
OPTIONS James Maxwell John Dalton James
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What contribution did J.J. Thomson make to the development of atomic theory?
OPTIONS said that atoms are solid masses showed that
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Scenario:
Sara is your next door neighbor and is in your science class. For tomorrow’s test, she needs help understanding
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linear relationship for -6 -1
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1.
A gift box in the shape of a rectangular prism has a volume of 384 cubic inches. The base of the box is a square with an area
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A stereo speaker in the shape of a triangular pyramid has a height of 6 inches. The area of the base of the speaker is 11
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A 2-liter bottle of soda was
7/8 full. Lauren drank some of the soda, and when she was finished, the bottle was 2/3 full. How
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Kenya likes to run on a
3/4-mile track at the local high school. If she runs 8 1/2 laps on Saturday, how many laps will she need
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Of the 250 sheep in a flock, 34% are white. What is the total number of white sheep in the flock
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A bookstore offered mystery bags each containing 12 books. The quantity of each type of book was the same in each mystery bag. A
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A recipe for fruit salad includes
1/3 cup of grapes for 4 servings. How many cups of grapes are needed for 30 servings of this
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Ana drew a map of the Panama Canal. In the scale Ana used for the map, 4 centimeters represents 20 kilometers. The actual length
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An aquarium shaped like a rectangular prism has a length of 12 inches, a width of 11 inches, and a height of 20 inches. The
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Melinda is finding the circumference of a circle that had a diameter of 8 feet. What is the circumference to the nearest
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