7th grade SCIENCE REVIEW 2nd Semester

Which of the following best summarizes photosynthesis?

• 
  A chemical reaction involving nitrogen and other atmospheric gases

• 
  An adaptation of plants that allows them to add nutrients to the soil

• 
  A process by which plants produce sugar using the energy of sunlight

• 
  An exchange of gases between animals and the air or water of their habitat

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

An exchange of gases between animals and the air or water of their habitat

What is the missing component that correctly replaces the question mark to complete the diagram?

• Soil nutrients

• Water

• Thermal energy

• Glucose

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Students are observing an aquatic plant. They understand that the bubbles they see rising from the cut stem of the plant are the gases produced during photosynthesis. Which of the following observations provides the best evidence that light is the source of energy for photosynthesis?

• Plants observed in artificial or in natural light were both seen to produce bubbles.

• The frequency of bubbling increases in bright light and slows to a stop in darkness.

• The orientation of the light seems to have no effect on the production of bubbles.

• The bubbles always rise to the surface of the water, moving towards the light.

Tags

NGSS.MS-LS1-6

The diagram provided is an incomplete concept map for the process plants use to get energy from food.

Which of the following best represents the missing step?

• 
  Atoms rearranged

• Light emitted

• Temperature decreased

• Water added

Tags

NGSS.MS-LS1-6

NGSS.MS-LS1-7

Cellular respiration is similar in both plants and animals in what way?

• Energy is required and oxygen is released.

• Nitrogen is required and energy is released.

• Oxygen is required and energy is released.

• Oxygen is required and sugar is released.

Eagles and grizzly bears live together in the same habitat. There will be competition between the eagles and the grizzly bears only if which of the following is true?

• Grizzly bears hibernate during the winter while eagles remain active.

• Pesticides in the fish population affect eagles’ eggs and decrease their population.

• 
  Both grizzly bears and eagles feed on the same species of salmon.

• Laws prevent humans from being able to hunt eagles or grizzly bears.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

The population of deer in a certain area is monitored over a period of six years. The data is represented in the graph provided.

Which of the following is the most likely explanation for the change in population in 2009?

• Wolves, which prey on deer, were being hunted more than usual.

• Rainfall in the previous spring was higher than the yearly average.

• Humans introduced grazing animals that feed on the same plants as the deer.

• 
  More insects that pollinate flowering plants move into the habitat.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-2

Two species of fish live in the same pond. They eat the same kinds of plants. They are eaten by the same water birds. Which of the following would increase competition between these two species of fish?

• Average habitat temperature increases.

• Population of water birds increases.

• Number of food plants increases.

• Water level in the pond decreases.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

The graph below shows the populations, over several years, for two animals that share a habitat. Foxes are mammals that hunt for food, and grouse are birds, a common prey animal of foxes. According to the data, in which year did the population of foxes show a decrease that is most likely the result of a decrease in the availability of a source of food?

• 2003

• 2005

• 2008

• 2012

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An increase in the population of an organism would most likely be associated with which of the following?

• A series of severe weather events in the habitat

• 
  A decrease in necessary resources available

• 
  An expansion of suitable living space

• An increase in animals that prey on the organism

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4