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Elar > Science > Flashcards

Science Flashcards

1
Q

What is the heliocentric theory?

What is the Geocentric theory?

A

Heliocentric theory= sun in the middle of the universe Nickolaus Copernicus
Geocentric theory= earth in the middle of the universe Ptolomy

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2
Q

What factors keep the planet in orbit

A

Gravity and inertia

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3
Q

What do the inner planets have in common

A

They have solid rocky surfaces

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4
Q

What do the outer planets have in common?

A

They are large and all gassy

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5
Q

What do the inner and outer planets have in common?

A

They orbit the sun

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6
Q

where is the asteroid belt located?

A

Between mars and Jupiter.

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7
Q

How are Venus and earth similar?

A

Similar in size and density.

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8
Q

What is a comet?

A

A shooting star of rock and dust.

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9
Q

What is the net force?

A

The overall force on an object.

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10
Q

List the three ways simple machines affect work?

A

DAD

DISTANCE NEEDED, AMOUNT OF FORCE NEEDED, DIRECTION.

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11
Q

What is potential energy.

A

Stored energy

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12
Q

Kinetic energy

A

Energy in motion

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13
Q

Two examples of kinetic and potential.

A 
Kinetic            Potential
                          Coiled spring
                          Raised weight
Airplane
Baseball thrown
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14
Q

Formula for distance, speed, and time

A

D=SxT S=D/T T=D/S

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15
Q

How fast is an object that travels 120m in 50sec

A

2.4m/s

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16
Q

Force

A

A push or pull

17
Q

Motion

A

Direction an object is going

18
Q

Two boxes are pushed across the floor one with bricks and one with styrofoam. Which will go faster?

A

The styrofoam box, it’s lighter.

19
Q

What is the formula for work

A

Distancexforce.

20
Q

How do you get density?

A

Mass/volume

21
Q

What factors help identify minerals?

A

Hardness,streak,luster, cleavage,color

Elar (2 decks)

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