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#1 Flashcards

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1
Q

Any force that causes an object to move in a circle is called a(n)

A

Centripetal force

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2
Q

Which two substances can be mixed together to form a new substance through a chemical reaction?

A

Baking soda and vinegar

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3
Q

The flower of a plant is involved in reproduction. Which parts are male and which are female?

A

Male: stamen; female: pistil

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4
Q

Which occurs when atoms link together in new ways to create a substance different from the original substances?

A

a chemical change

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5
Q

The Earth’s diameter is approximately how many kilometers?

A

12,756

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6
Q

In animals, sexual reproduction depends on the production of gametes. Which of the following processes produces gametes in animals?

A

Meiosis

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7
Q

A woman lifts 20 bricks, each of weight 6N. What other information is needed to calculate the useful work done in lifting the bricks?

the volume of the bricks

the mass of the bricks

the distance she lifts the bricks

the time taken to lift the bricks

A

the distance she lifts the bricks

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8
Q

What is the curved path that an object follows when thrown or launched near the surface of the Earth?

A

Projectile motion

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9
Q

The greater the mass of an object,

the greater its inertia.

the easier the object starts moving.

the more balanced it is.

the more space it takes up.

A

the greater its inertia.

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10
Q

The transfer of heat by the movement of a fluid is called

A

convection

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11
Q

Earth rotates in about _______ hours.

A

24

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12
Q

The lithosphere combines what two layers?

A

Crust & Upper Mantel

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13
Q

What is the greenhouse effect?

Releasing Earth’s radiation back into space.

The cooling of Earth due to air pollution.

The heating of a solid, such as a rock.

The warming of a planet due to trapped radiation.

A

The warming of a planet due to trapped radiation.

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14
Q

Why is DNA important?

A

it serves as the blueprint for traits of all living things

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15
Q

Distillation is the process of separating liquids by using _____.

Precipitation and transpiration

evaporation and condensation

A catalyst

a centrifuge

A

evaporation and condensation

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16
Q

Nucleotides are made up of a sugar, phosphate, and..?

cholesterol

fatty acid

nucleic acid

nitrogenous base

A

nitrogenous base

17
Q

When velocity is doubled:

Kinetic energy is doubled

Momentum is doubled

Acceleration is doubled

Potential energy is doubled

A

Momentum is doubled

18
Q

Which of the following is an example of a homozygous dominant genotype?

BB

bB

bb

Bb

A

BB

19
Q

What it the process called when acids and bases react to form salt?

A

Neutralization

20
Q

The human body has 23 homologous pairs of chromosomes. How many chromosomes does a somatic cell have?

A

46

21
Q

Sandra was burning a vanilla candle. Was there a chemical reaction?

A

Yes, because the properties of the wick changed.

22
Q

Scientists once thought that the continents had formed in their current locations. Alfred Wegener first published this theory of continental drift in 1915. Which of the following provides evidence for continental drift?

Africa North America and South America fit together like puzzle pieces.

Africa and South America have the same type of climate.

Movement of the Australian continent was observed.

Plants and animals found in Africa differ from those found in Australia

A

Africa North America and South America fit together like puzzle pieces.

23
Q

A force is a ____________________

motion

speed

push or pull

net force

A

push or pull

24
Q

Natural radioactivity was discovered by:

Marie Curie

Henri Becquerel

Ernest Rutherford

Enrico Fermi

A

Henri Becquerel

25
Q

The force of __________________ is a type of friction that works against the motion of falling objects.

A

Air resistance

26
Q

You are at the Kennedy Space Center, sitting in your rocket, ready to launch. You look out the window and view the sky. You are currently sitting at the lowest level of the atmosphere. What is this level called?

Lithosphere

Troposphere

Earthosphere

Terrasphere

A

Troposphere

27
Q

Which of the following properties of water enables it to move from the roots to the leaves of plants?

Water exhibits cohesive behavior.

Water is an excellent solvent.

Water expands as it freezes.

Water moderates temperature.

A

Water exhibits cohesive behavior.

28
Q

Where are earthquakes most likely to occur?

where Earth’s tectonic plates are moving together

where Earth’s lithosphere is in constant slow motion

where magma cools slowly beneath Earth’s surface

where Earth’s seafloor is spreading into deep ocean trenches

A

where Earth’s tectonic plates are moving together

29
Q

The universal law of gravitation was propounded by:

Galileo Galilei

Johannes Kepler

Isaac Newton

Nicolas Copernicus

A

Isaac Newton

30
Q

A battery operated DVD player uses 12 volts from AA batteries and draws a current of 3 amperes. What is the resistance?

36 ohms

4 ohms

15 ohms

9 ohms

A

4 ohms

31
Q

If a 10 kilogram object accelerates suddenly at 15 m/s2, how much force was applied to the object?

15 Newtons

150 kilograms

150 Newtons

100 kilograms

A

150 Newtons

32
Q

Who formulated the geocentric theory?

Copernicus

Galileo

Ptolemy

Newton

A

Ptolemy

33
Q

What is the name of the solid that forms after some solutions react chemically?

Precipitate

Solid

Mixture

Colloid

A

Precipitate

34
Q

According to Newton’s third law of motion, when a hammer strikes and exerts force on a nail, the nail-

disappears into the wood.

exerts an equal and opposite force on the hammer.

creates a friction with the hammer.

moves at a constant speed.

A

exerts an equal and opposite force on the hammer.

General Science (1 decks)

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