7th Grade Science EOY Review

The Loop Current includes warm water flowing at deep depths. Scientists hypothesize that the Loop Current may be the most significant source of energy for hurricanes in the Gulf of Mexico. Which would be the MOST likely reason to study the Loop Current?

• to help predict the paths of hurricanes as they move from the Gulf of Mexico to the Atlantic Ocean

• to help to understand the relationship between deep, warm currents and hurricane intensity

• to help predict the changes in the fish population during hurricane season

• to help to understand the tides during hurricane season

What would happen if the cardboard circle was placed between the two batteries?

• The flashlight would not work.

• The light would only be half as bright.

• The cardboard would not affect the flashlight.

• The flashlight would stay on if she turned off the switch.

Which of the following shows the situations organized from least to greatest amount of work done on the box?

• 4, 2, 1, 3

• 1, 4, 3, 2

• 4, 1, 2, 3

• 1, 2, 3, 4

This diagram illustrates a type of reproductive process in an organism. Based on this information, what conclusion about the offspring labeled “A” is supported?

• It has acquired traits in response to its environment.

• It has a lower mass of genetic material than offspring B.

• It has the same genetic material as its parent.

• It has half as much genetic material as its parent.

A human body cell has 46 chromosomes. Which diagram represents mitosis in a human body cell?

• 
• 
• 
• 

Two swimmers competed in a race. The graph shows how the position of both swimmers changed over time during the race. At what rate of speed did Swimmer 1 travel throughout the race?

• 0.5 m/s

• 1.0 m/s

• 2.0 m/s

• 4.0 m/s

The motion of a toy car is shown in the graph below. In which section of the graph is the car moving away from its starting point?

• W

• X

• Y

• Z

Angela blows air into a balloon and holds the end of it closed with her fingers. When she lets go of the end of the balloon, Angela observes that the release of the air propels the balloon. The propelling of the balloon from the release of the air is an example of which of Newton’s laws?

• For every action, there is an equal and opposite reaction.

• A force of attraction exists between any two objects with mass.

• The force of an object is the product of its mass multiplied by its acceleration.

• An object in motion tends to stay in motion unless an unbalanced force acts upon it.

Cells take in food for energy. The part of the cell that aids in digestion of the food is the lysosome. What is the main role of lysosomes in the process of food digestion?

• building proteins

• breaking down wastes

• controlling the activities of the cell

• converting energy from one form into another

During exercise, the cardiovascular system works together with the respiratory system to

• maintain blood pressure.

• remove carbon dioxide.

• produce red blood cells.

• filter out waste products.