Unit 1 Test Review

A student was washing laboratory in warm, soapy water when the ring he was wearing slipped off his finger. Which safety procedure should the student have followed?

• Wash all lab glassware in cold water

• Wear gloves during lab experiments

• Do not use soap when washing any lab glassware

• Remove all jewelry before beginning any lab experiments

In a Biology class, a student places a tissue specimen on a glass microscope slide. The student drops the slide, and the slide shatters. What procedure should the student follow first?

• attempt to collect the specimen from the slide pieces

• use a broom to sweep up all glass on the floor

• pick up the larger pieces of the slide

• inform the teacher of the accident

Which condition allowed the hypothesis about the speed of light to become a scientific theory?

• The hypothesis was supported by a famous physicist

• The hypothesis predicted a wide range of consequences

• The hypothesis predicted the speed of light in a vacuum

• The hypothesis was supported by many different experiments

Which of these statements applies to a scientific hypothesis but not to a scientific theory?

• It consists of tentative statements that can be tested

• It has been proven to be true by experiments

• It is supported by a number of independent observations

• It explains a wide range of observations and results

A biologist is testing a new fungicide on corn plants infected with a leaf fungus. It is important to have a control group to show that

• the application of the fungicide is practical and cost effective

• the fungicide is safe for other organisms in the environment

• results of the experiment can be duplicated on other plants

• effects seen in the test group are caused by the fungicide

A student wants to test the impact of X-ray radiation on tomato plant growth. Which of the following guidelines should be followed when designing the control group?

• It is not exposed to x-ray radiation

• It is not exposed to ultraviolet light

• It is exposed to increased microwave radiation

• It is exposed to twice as intense X-ray radiation

What property of water best helps aquatic life survive in lakes during the winter?

• water has a high specific heat capacity

• water has a high surface tension

• water is less dense as a solid than as a liquid

• water is a polar molecule

Trees use narrow tubes to transport water upward. Which property of water allows the water to rise in these narrow tubes?

• high vapor pressure

• high boiling point

• cohesion of molecules

• net charge of molecules

Why is sweating an effective way to cool the body?

• Evaporating water absorbs excess heat from the skin

• Evaporating water releases excess heat to the skin

• Condensing water absorbs excess heat from the skin

• Condensing water releases excess heat to the skin

Which property of water allows it to dissolve substances like salt and sugar but prevents it from dissolving lipids?

• pH

• polarity

• adhesion

• cohesion