PS-0.1 Observations And Inferences: Question Preview (ID: 1954)

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Science is based on
a) logic
b) philosophy
c) observation
d) deduction

In order to make an observation, a scientist
a) uses logical thinking
b) uses his senses
c) examines other scientists' work and draws conclusions
d) guesses what happened to cause the event he is observing

Scientists use tools to
a) break down false theories
b) build hypotheses
c) construct concepts
d) extend their senses

Which of the following tools could a scientist use to extend his sense of sight?
a) a test tube
b) a microscope
c) a thermometer
d) a loudspeaker

Qualitative observations
a) always have a number
b) describe a quality such as color or texture
c) can be used to separate good from bad
d) are preferred by scientists

Which of the following statements is a quantitative observation?
a) The earthworm is brown.
b) Earthworms stink.
c) The earthworm is 5cm long.
d) Earthworms make good bait for fishing.

What is an inference?
a) a wild guess
b) an explanation of an observation
c) the opposite of a hypothesis
d) a form of observation

What is the major rule for making an inference?
a) the inference must be correct
b) use your imagination and be creative
c) the inference must be logical
d) prepare your inference before you make any observations

Which of the following statements is a qualitative observation?
a) The robin has yellow feet.
b) Robins need to eat more food during cold weather than during warm weather.
c) The robin has two feet.
d) If the temperature of the environment decreases, then the amount of food consumed by a robin will increase.

Which of the following statements is an inference?
a) The boy standing next to the water has wet hair, clothing, and skin.
b) The boy standing next to the water must have been swimming.
c) The boy standing next to the water has two seashells in his hand.
d) The boy standing next to the water has red hair.

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