Review questions unit 7

Steve from mine craft is building a mansion that is zombie proof. He uses different types of brick that have two different masses. The mass of brick one is 50kg and the mass of brick two is 100kg. As Steve builds the zombie proof mansion he lifts each of the two types of brick with a crane with the same acceleration of 800m/s² . Which statement would be accurate about the force each of the two bricks are being pulled with?

• Both bricks are being pulled with the same amount of applied force.

• Brick one requires more applied force than brick two.

• Brick two had half the amount of applied force than brick one.

• Unable to determine. Need more info.

The west coast and east coast of South America are located near the equator and receive about the same amount of sun. Looking at the image between the east coast and the west coast, which would have cooler weather during the winter season?

• The east coast will have cooler weather than the west coast.

• Both coast will experience the same weather since they are on the same continent.

• The Brazilian current on the east coast current will bring warmer weather and the Peru current on the west coast will bring cooler weather.

• Since there is a beach on both coast, the weather will always be hot.

A chemical reaction occurred, but the reaction did not follow the law of conservation of mass. Why after the reaction were the masses different?

• The law of conservation of mass states that matter can not be created or destroyed, so everything was the same.

• The mass changed because the substance changed color and destroyed atoms.

• Some of the mass was released from the container in the form of gas during the reaction.

• The number of elements that reacted were different.

Which category of stars are considered the coolest and brightest?

Looking at the diagram of a food web that has low biodiversity, what would happen if the grass started to die due to a harmful virus?

• The food web has an abundance of other resources to depend on, so it will survive

• Abiotic factors like the sun and water is enough for the food web to survive.

• The food web will not survive because of the low biodiversity and limited resources.

• Each species will adapt in the same food web because they are specialized to do so.