2022 EOY Review 7th Science

The roots of plants grown on the space shuttle while in orbit around Earth all have different orientations.  A logical conclusion is that the irregular root growth is caused by the lack of –  (7.13A) soil. glucose. gravity. sunlight.

 

• soil

• glucose

• gravitiy

• sunlight

A student is examining a cell through a microscope. She notes the following cell organelles: cell membrane, cell wall, chloroplast, large vacuole, mitochondria, cytoplasm, and nucleus. What type of cell is the student looking at?

• A plant cell because only plant cells have cytoplasm.

• An animal cell because only animal cells have large vacuoles .

• A plant cell because only plant cell have a cell wall and chloroplasts.

• She cannot be sure because both plant and animal cells have those cell organelle.

Eugene drew the following diagram to describe the levels of structural organization of an animal’s body. He will list the cell as both the least specialized and the most numerous at the bottom of the pyramid.  Which of the following should he list in level 2 on the diagram below?

 

Organ

Tissue

Organism

Organ system

 

 

Organ

Tissue

Organism

Organ system

 

• Organ

• Tissue

• Organism

• Organ Systems

Which statement below is true for the digestive systems structures and functions that breaks down food both chemically and physically?

• The mouth and stomach change food both physically and chemically

• The mouth can only perform physical changes on food

• Only chemical changes happen in the stomach

• Only chemical changes happen in the stomach

In Galveston, the beaches are often exposed to hurricanes originating in the Gulf of Mexico.  It is reasonable to predict that hurricane activity may –

• create new rivers near Galveston

• move sand from the beach to offshore sand bars

• cause local earthquakes after the storm

• create new river deltas along the beaches

Look at the food web. What do the directions of the arrows represent?

• The arrow shows an animal moving into another animal’s habitat

• The arrow shows the energy flow from one organism to another organism

• The arrow points from consumer to producer

• The arrow points from a predator to its prey.

A student drew the picture of a human body system below. The student labeled some of the organs of the system. The main function of this system is to – Transport nutrients throughout the body

• Sense odors in the environment

• Chew food as it enters the mouth

• Exchanges gasses with the environment

• Transport nutrients throughout the body

During an investigation, a student combined the two clear,colorless solutions shown below.

The student observed that the temperature changed from 25°C to 23°C when the solutions were combined and that a white substance rapidly formed and settled at the bottom of the container. What most likely happened to these results?

• One of  the original compounds came out of the solution

• The solutions reacted chemically

• Some of the water froze into ice crystals

• Rapid evaporation of water occurred, leaving a solid

The picture below shows variation in the beaks of Finches. This is likely due to:

• Natural Selection

• Asexual Reproduction

• Selective Breeding

• Uniformity

Which term is associated with the climax community that is established by ecological succession?

• Change

• Immature

• Poorly-Adapted

• Stability