Do Now 2/27

If enough heat is taken away from a container of water, what will happen to the water?

• It will begin to boil.

• It will become a solid.

• It will turn into a gas.

• It will increase in weight.

Dorothy wanted to know what would happen if a moving object were to hit a non-moving object. She made a track using a ruler. Dorothy rolled Marble A down the track. Marble A hit Marble B and stopped rolling. Marble B then started rolling. Which statement BEST explains what happened to Marble B?

• Magnetism attracted Marble A to Marble B.

• Gravity acted on Marble B, causing it to roll.

• Energy from Marble A was transferred to Marble B.

• Friction working against Marble A caused it to stop moving.

Joshua makes a ramp out of some books and a plank of wood. He can change the height of the ramp by adding books under the plank. He rolls a toy car down each ramp. At the bottom of which ramp would the car be traveling the fastest?

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Four different students take turns pushing a large, heavy ball on the school parking lot. What is the BEST way to determine which student used the most force to push the ball?

• compare the sizes of the students

• compare the ages of the students

• compare the distances that the ball rolled

• compare the number of times the ball was rolled

Which statement BEST illustrates the use of gravity and pushing forces on a given object?

• A student tosses a ball into the air; and then it falls back down and bounces off the floor.

• A student rolls a ball across the carpet; and then it stops halfway across the room.

• A student constructs a building out of craft sticks; however, it does not fall with a strong wind blowing.

• A student constructs a house of cards; however, when a card in the middle of the structure is tapped, the entire structure collapses.

Galileo was able to support Copernicus’s theory about the solar system with ____that Galileo made using a____in his investigation of "heavenly bodies". Copernicus's theory states that the Sun is the center of the solar system and the planets orbit around it.

• the writings of Aristotle; satellite

• his personal observations; telescope

• the principles of Ptolemy; star chart

• the principles of Aristotle; telescope

GSB1 is an organism that lives in hydrothermal vents and surrounding areas located 2,500 meters deep in the ocean.  Although sunlight does not reach this depth, GSB1 gets its food solely from photosynthesis.  The hydrothermal vents heat the surrounding waters to 752°F.

(Note: Hydrothermal vents are cracks in the Earth's crust that emit heated minerals and water from the inner layers of the Earth)

Which of the following explanations correctly describes how GSB1 carries out photosynthesis?

• The GSB1 organism is able to travel up to levels where light penetrates and then go back to their habitat.

• The GSB1 organism has evolved to perform photosynthesis without needing any light energy.

• The high temperatures of the hydrothermal vents provide enough energy to make photosynthesis unnecessary for the GSB1 organism.

• The GSB1 organism has evolved to utilize low levels of light from the high-temperature hydrothermal vents.

A student collects leaf samples from the forest area above.  She observes that since the leaves from the 0-10- meter zone receive less sunlight than the leaves in the 20-meter zone.  She hypothesizes that slight physical differences exist to compensate for the lack of sunlight.  She notes that the leaves from 20 meters are much ____and ____than the leaves from the 0-10-meter zone as support for her hypothesis.

• smaller; thicker

• smaller; thinner

• larger; thicker

• larger; thinner

Which form of energy do plants need to capture in order to perform photosynthesis?

• heat

• solar

• chemical

• electrical