Flashcards in Science Deck (188)
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1
An eclipse of the sun throws the shadow of the
moon on the earth
2
Substances that hasten a chemical reaction without themselves undergoing change are called
Catalysts
3
Lack of iodine is often related to what disease
Goiter
4
Under natural conditions, large quan of organic matter decay therefore
soils maintain their fertility
5
The thin layer that forms the front of the eyeball is called the
Cornea
6
The most likely reason why dinosaurs became extinct was that they
Failed to adapt to a changing environment
7
Which of the following is a chemical change
Burning one pound of coal
8
A person with high blood pressure should
avoid salt
9
The chief nutrient in lean meat is
Protein
10
Spiders can be distinguished from insects by the fact that spiders have
four pairs of legs
11
An important ore of uranium is called
Pitchblende
12
Of the following the lightest element known on earth is
hydrogen
13
Of the following gases in the air, the most plentiful is
nitrogen
14
The time it takes for light from the sun to reach the earth is approximately
8 minutes
15
Of the following types of clouds, the ones that occur at the greatest height are
Cirrus
16
New drug test. Group A takes drug. Group B takes sugar pill. Group B called
An experimental control
17
After adding salt to water, the freezing point of the water is
lowered
18
Radium is stored in lead containers because
the lead absorbs the harmful radiation
19
The type of joint that attaches the arm to the shoulder blade is the
Ball and socket
20
Limes were eaten by British sailors in order to prevent
Scurvy
21
The time that it takes for the Earth to rotate 45 degrees is
3 hours
22
Of the following planets, the one that has the shortest revolutionary period around the sun is
Mercury
23
What is the negative particle that circles the nucleus of the atom
Electron
24
In the International System of Units, a measurement for mass is a
kilogram
25
What is energy called that is derived from the Earth's internal heat?
Geothermal
26
Compouds that include fat and oils found in foods and the human body are
Lipids
27
Resistance is the tendency for a material to oppose the flow of electrons and is measured in
Ohms
28
In order for a lunar eclipse to take place the
earth's axis of rotation must point toward the moon
29
A scientist who studies animals would be called a
zoologist
30
