Exploring Science: 7th Grade Quiz

What is the term for the process by which plants make their own food using sunlight?

• Photosynthesis

• Respiration

• Transpiration

• Digestion

Which of the following is a basic unit of life?

• Atom

• Molecule

• Cell

• Organ

Describe the process of evaporation.

• The change of a liquid into a solid

• The change of a gas into a liquid

• The change of a liquid into a gas

• The change of a solid into a gas

Which of the following best explains why the sky appears blue?

• The ocean reflects its color onto the sky

• Blue light is scattered in all directions by the gases and particles in the atmosphere

• The sun emits more blue light than any other color

• Blue light is absorbed by the atmosphere

Analyze the following data: A plant grows 2 cm in the first week, 3 cm in the second week, and 5 cm in the third week. What is the average growth per week?

• 2 cm

• 3 cm

• 3.33 cm

• 4 cm

What is the primary gas found in Earth's atmosphere?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Hydrogen

Explain the role of chlorophyll in photosynthesis.

• It absorbs water

• It absorbs sunlight

• It releases oxygen

• It stores glucose

Which of the following diagrams best represents the water cycle?

• A diagram showing only evaporation and precipitation

• A diagram showing evaporation, condensation, and precipitation

• A diagram showing only condensation and precipitation

• A diagram showing only evaporation and condensation

Conduct a simple experiment to determine the effect of sunlight on plant growth. What is the independent variable in this experiment?

• Amount of water given to the plant

• Type of plant used

• Amount of sunlight received

• Growth of the plant

What is the chemical formula for water?