Science wrap-up Part 1

Which 2 statements are scientific claims

• Mars is the best planet in the solar system for human to explain further.

• Images of Mars shoe it once had liquid water flowing on its surface.

• The apparent movement of Mars across the sky influence how people behave

• The polar ice caps of Mars consist mainly of carbon dioxide.

A teacher cut an apple into 3 wedges of the same size. She dipped one wedge in lemon juice, dipped another in water, and left one alone. Then she left the wedges on a paper towel on her desk. After 1 hour, only the wedge that had been dipped in lemon juice was still yellow. The other two wedges had turned brown

What is the manipulated variable in this experiment?

• The size of the apple wedges.

• The liquid the apple wedges were dipped in

• The color of the apple wedges after 1 hour

• The amount the apple wedge were dipped in.

Which statement is a hypothesis?

• Most of the earthworms moved to the shaded area during the experiment.

• Do earthworms prefer bright light or darkness?

• The earthworms must all be the same species.

• If an earthworm is given a choice, it will move toward the darkness rather than ligh

If a scientist gets unexpected results during the first trial of experiment, what should he/she do next?

• Reject the scientific theory is NOT supported by the results

• Change the data to match the expectations.

• Publish only the expected data.

• Repeat the experiment to be sure the results are valid.

Which of these is important to gathering and interpreting scientific information.

• emotion

• religion

• logic

• emotion

The student made a model of an onion skin cell she viewed using microscope. The scale is 500:1 The student's cell model has a length of 15 cm.

Jow many cenitmeters is the real cell's length?

• 0.003 cm

• 0.002 cm

• 7500 cm

• 33 cm

Which object has the most kinetic energy?

• a car travelling 25km/h

• a bicycle traveling 20km/hr

• a dump truck waiting at a stoplight

• a motorcycle traveling 15 km/h

The gravitational energy of a rock at different heights is shown in the table.

Which graph BEST represents the relationship between the rock's gravitational energy and its height above the ground?

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 Which temperature scale is commonly used in science because it starts from absolute zero?  

• Celsius

• Fahreneit

• Kelvin

• Joule

 Which term refers to the point where no molecular motion occurs?  

• Kinetic energy

• absolute zero

• thermal energy

• temperature