* 4 Sphere of the earth/ Carbon cycle

What is the smallest building block of matter?

• Element

• Molecule

• Atom

• Compound

Which of the following is an example of a molecule?

• Sodium (Na)

• Carbon dioxide (CO₂)

• Oxygen (O)

• Hydrogen (H)

Tags

NGSS.MS-PS1-1

What is a pure substance made of one kind of atom called?

• Molecule

• Compound

• Element

• Mixture

Which of the following is an example of a chemical we use in daily life?

• Water (H₂O)

• Salt (NaCl)

• Helium (He)

• Nitrogen (N₂)

What does the biosphere include?

• All water bodies

• All living things and where they live

• All gases in the atmosphere

• All solid landforms

Tags

NGSS.MS-LS2-3

What does the prefix "bio-" mean in the term "biosphere"?

• Water

• Life

• Earth

• Air

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which element is found in living things and is important to the biosphere?

• Oxygen

• Helium

• Carbon

• Neon

Tags

NGSS.MS-LS2-3

What percentage of Earth's water is salt water?

• 50%

• 75%

• 97.5%

• 0.5%

Why is fresh water considered an important resource?

• It is used for building structures.

• It is needed for survival, including drinking and growing food.

• It is abundant and easy to access.

• It is used to generate electricity.

Tags

NGSS.MS-ESS2-4

NGSS.MS-LS2-3

What is the crust of the Earth made of?

• Solid rock

• Moving sections called tectonic plates

• Liquid magma

• Gaseous layers

Tags

NGSS.MS-ESS2-1