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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

A group of tissues in the human body which work together is

Organ