Chapter 12-The earth and beyond|chapter 13-sound

Question 1

The sun And stars are…

Answer 1

Sources of light

Question 2

The moon, the planets and comets reflects light from the sun towards…

Answer 2

The earth

Question 3

The earth rotates on its axis,What is the axis

Answer 3

Imaginary line or road that runs through the center of the earth from North Pole to the South Pole

Question 4

Which direction does the earth turn

Answer 4

Anti-clockwise

Question 5

What is the earths path around the sun called

Answer 5

It’s orbit

Question 6

The axis of the earth is not vertical but is at an angle of about… To the perpendicular

Answer 6

23°

Question 7

What are the seasons and each hemisphere related to?

Answer 7

Earths tilted with respect to the sun

Question 8

What season is it when a hemisphere is talking towards the sun

Answer 8

Summer

Question 9

Look at the diagrams of the earth and the sun and the planets in your photos and study it

Answer 9

I bet you didn’t do that well go study it again

Question 10

What did the ancient Greeks believe about the solar system And what was this belief called

Answer 10

Thank your grades for leave that all the objects in the sky were set in Crystal spheres Which moved around the earth. This police was called the earth sent of the universe and held by almost everyone for 1300 years

Question 11

Yellow used a telescope to show Jupiter has moons that moved around it, and not around the earth indicating…

Answer 11

That other objects also might not move around the earth

Question 12

How is sound made

Answer 12

Sound is made when an object vibrates

Question 13

Explain in detail how sound is made

Answer 13

The tone for movement of an object is transferred to the particles in the air around it the Air particles next to the vibrating object Push on the air particles next to them and they push on air particles further away, and so on. Once a particle has pushed, swings back to receive another pushing the vibrating object and other particles around it. The swinging of the particles produces regions of high and low pressure move away from the object and create a sound wave

Question 14

Go look in your camera roll at the diagrams of sound waves

Answer 14

Go back I bet you don’t know what you just looked at, try learn it, we don’t want to fail

Question 15

What is the loudness of a sound related to?

Answer 15

The loudness of sound is related to the amount of movement from the vibrating object

Question 16

If the object moves only a small distance to and fro it makes a sound wave with small amplitude and sound will be…

Answer 16

Quiet

Question 17

If the object moves a large distance to and fro it makes a sound wave with large amplitude and sound will be…

Answer 17

Loud

Question 18

And object makes a certain number of… In a second

Answer 18

Vibrations

Question 19

What is frequency and what is it measured in?

Answer 19

The number of waves produced per second, this is measured in hertz with the unit symbol Hz

Question 20

Low pitch sound has low frequency waves with longer wavelengths then a high pitch sound, which has higher…

Answer 20

Frequency waves with shorter wavelengths