Released Items Grade 7 Science 2016-2017

Sally ran a distance of 8 m in 16 seconds. Which best describes her motion?

• Her speed remained constant.
• She has no speed constant.
• Her speed is not constant
• Her speed is velocity

How does the energy of a roller-coaster cart change as the cart travels from the top of the roller coaster to the bottom?

• The cart has Kinetic energy at the top that is transformed to kinetic energy as it moves to the bottom.
• The cart has potential energy at the top that is transformed to kinetic energy as it moves to the bottom.
• The cart has any energy at the top that is transformed to kinetic energy as it moves to the bottom.
• The cart has eolic energy at the top that is transformed to kinetic energy as it moves to the bottom.

How can a simple machines make work easier?

• by decreasing the force needed to complete the task
• by increasing the force needed to complete the task

Why does the troposphere experience the greatest amount of atmospheric pressure compared to the other atmospheric layers?

• It contains lower concentration of gas particles
• It contains higher concentration of gas particles

Which explains why most of the rain that falls comes from the ocean?

• The majority of evaporation takes place over the ocean
• The majority of evaporation does not take place over the ocean

Barometric pressure has been dropping all day. What weather conditions will most likely occur?

• Sunny Weather
• Stormy Weather

A sea breeze blows from the ocean toward the shore. Why does this occur?

• Air over land heats faster than air over water, which causes convection
• Air over land heats slower than air over water, which causes convection

Which two organisms contains chloroplasts and eyespots?

• Volvox and Euglena
• Eolvox and Vuglena

How do a paramecium and an amoeba obtain food to live?

• A paramecium collects food into an pseudopods, while an amoeba uses an oral grove to surround food.
• A paramecium collects food into an oral groove, while an amoeba uses pseudopods to surround food.

Tina observed a cell under a microscope. she concluded that it was a plant cell instead of an animal cell. Which structure helped her come to this conclusion?

• She saw a chloroplast, which animal cells lack
• She saw a nucleus, which animal cells lack