March 19 Period 1

All living things require matter. Why does life on Earth depend on matter?

• They need matter such as food and water to survive, grow, and carry out life processes.

• Plants get the matter they need from their environment from their roots. Animals get the matter they need from eating food and by taking in water.

• Atoms that make up the original substances are regrouped into different molecules.

• The energy in molecules and motion.

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__ is the smallest unit of a substance.

• Atom
• Element

• Matter

• Molecule

How many hydrogen atoms are there in a water molecule? 

• 0
• 1
• 2
• 3

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NGSS.MS-PS1-1

What is being shown here?

• 6 atoms of the same compound

• 6 molecules of the same compound

• A mixture of atoms and molecules

• A mixture of different compounds

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This picture represents which of the following?

• element

• compound

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Which of the following is a pure substance?

• Soil

• Wood

• Air

• Water

What is the chemical symbol for gold?

• Ag

• Au

• Pb

• Fe

Which of the following is a chemical change?

• Boiling of water

• Melting of ice

• Rusting of iron

• Breaking of glass

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Which of the following processes involves a physical change?

• Freezing of water

• Cooking of an egg

• Rusting of a nail

• Burning of paper

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NGSS.MS-PS1-4

What is the chemical formula for table salt?

• CO2

• H2O

• O2

• NaCl

Tags

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