Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).Based on this information:(1 point)
Responses
carbon, hydrogen, and methane are all compounds.
carbon, hydrogen, and methane are all compounds.
carbon and hydrogen are elements and methane is a compound.
carbon and hydrogen are elements and methane is a compound.
carbon, hydrogen, and methane are all elements.
carbon, hydrogen, and methane are all elements.
methane is an element and carbon and hydrogen are compounds.
carbon and hydrogen are elements and methane is a compound.
Mrs. Clark decides to do a demonstration for her class with a piece of notebook paper. Using a balance, Mrs. Clark discovers that the mass of the paper is 20 g. She then takes the piece of paper and cuts it into several small pieces. The cumulative mass of the small pieces is 20 g. What has Mrs. Clark demonstrated for her class?(1 point)
Responses
a physical change involving change of shape and size of matter
a physical change involving change of shape and size of matter
a physical change involving change of mass
a physical change involving change of mass
a chemical change involving change of mass
a chemical change involving change of mass
a chemical change involving change of shape and size of matter
a chemical change involving change of shape and size of matter
a physical change involving change of shape and size of matter
The three classes of rocks are sedimentary, metamorphic, and igneous. How are rocks classified into one of these three groups?
(1 point)
Responses
According to the method of their formation
According to the method of their formation
According to the amount of weathering they have endured
According to the amount of weathering they have endured
According to their position in the lithosphere
According to their position in the lithosphere
According to how many times they have been through the rock cycle
According to how many times they have been through the rock cycle
According to the method of their formation
The diagram below shows a sequence of rock layers. Examine the diagram, and answer the question that follows. Using radiometric dating, scientists have determined that Layer M is 110 million years old. Based on this information and the principle of superposition (younger layers lie above older layers):
(1 point)
Responses
Layers T, R, X, and G are all older than 110 million years.
Layers T, R, X, and G are all older than 110 million years.
Layer T is older than 110 million years, and Layers R, X, and G are younger than 110 million years.
Layer T is older than 110 million years, and Layers R, X, and G are younger than 110 million years.
Layer T is younger than 110 million years, and Layers R, X, and G are older than 110 million years.
Layer T is younger than 110 million years, and Layers R, X, and G are older than 110 million years.
Layers T, R, X, and G are all younger than 110 million years.
Layers T, R, X, and G are all younger than 110 million years.
Layer T is older than 110 million years, and Layers R, X, and G are younger than 110 million years.
Visible light that reaches the Earth from the Sun is known as white light. Which of the following statements about white light is true?(1 point)
Responses
White light is made up mostly of ultraviolet and infrared light.
White light is made up mostly of ultraviolet and infrared light.
White light is made up of a spectrum of many different colors.
White light is made up of a spectrum of many different colors.
White light is made up of only one color.
White light is made up of only one color.
White light falls within the microwave portion of the electromagnetic spectrum.
White light falls within the microwave portion of the electromagnetic spectrum.
White light is made up of a spectrum of many different colors.
At one time, all living organisms were separated into only two kingdoms—Animals and Vegetables. Once the microscope was invented and improvements in microscopy were made, however, more kingdoms were defined. The Protist kingdom was established in 1866, and the Monera kingdom was added in 1938.The Monera kingdom was later subdivided into the Eubacteria and Archea kingdoms in the1990s. Fungi were classified as plants until 1969. What is one reason why fungi were separated into a new kingdom?
(1 point)
Responses
Fungi are prokaryotic. Plants are eukaryotic.
Fungi are prokaryotic. Plants are eukaryotic.
Fungi are able to undergo photosynthesis and make their own food. Plants get the nutrients that they need by consuming other organisms.
Fungi are able to undergo photosynthesis and make their own food. Plants get the nutrients that they need by consuming other organisms.
All fungi are unicellular. All plants are multicellular.
All fungi are unicellular. All plants are multicellular.
The cell walls in fungi are composed of chitin. Plant cell walls are composed of cellulose.
The cell walls in fungi are composed of chitin. Plant cell walls are composed of cellulose.