TN Ready Science

Why do you see lightning from a distant storm before you hear thunder?

• The thunder is produced after the lightning.

• Your eyes react faster than your ears.

• Light travels faster than sound.

• Sound travels faster than light.

Waves that move the particles of the medium at right angles or perpendicular to the direction in which the waves are traveling are called

• transverse

• longitudinal

• surface

• combination

Describe the motion of the basketball after it leaves the players hands, and explain how this is an example of an acceleration change.

• The ball travels in curved trajectory in a single direction with decreasing speed. This is acceleration because of change in velocity

• The ball moves downwards and then upwards in an arc. This is acceleration because of the change in force pulling the ball downwards

• The ball travels in a horizontal line to the basket with increasing speed. This is acceleration because of a change in velocity.

• The ball travels in curved trajectory in a single direction with decreasing speed. This is acceleration because of change in direction

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In addition to anatomical evidence, how does genetic evidence support the claim that all life on Earth came from a common ancestor?

• DNA reveals how species are related and shows their shared genetic code

• Dominant and recessive alleles in genes cause variations in populations

• Similar embryonic development in fish, pigs and turtles reveal common ancestry

• Similar bone structure in mammals provides evidence of common ancestry

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What has the study of fossils allowed scientist to do?

• analyze the chemical composition of sedimentary rocks and minerals

• predict which organisms will become extinct in the future

• study present ocean temperatures at different depths

• describe past environments and the history of life

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Scientists combine evidence from fossils, body structures, early development, DNA, and protein structures to...?

• decide which fossils are older than others

• determine the evolutionary relationships among extinct species

• determine whether an organism will have gills during its early development

• determine what bones an animal has its forelimbs

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Every magnet, regardless of its shape, has two

• magnetic poles.

• magnetic charges.

• magnetic fields.

• magnetic needles.

What is one difference between a galvanometer and an electric motor?

• An electric motor causes something to move.

• A galvanometer uses an electric current.

• In an electric motor, the armature spins continuously.

• An electric motor uses electrical energy.

To reverse the direction of current in a motor, current is conducted...

• through the armature.

• in the direction of rotation.

• through the brushes to the commutator.

• through the commutator to the armature.

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Which statements accurately describes the motion of the car.

• The car is moving forward

• The car is stationary.

• The car is moving backwards.

• The car is turning.

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