Topic 7 Patterns in Space: Lessons 1 - 3

Question 1

Lesson 1:
a force of attraction between two objects

Answer 1

gravity

Question 2

Everything that has _________ exerts, or applies, a gravitational ____________on other objects.

Answer 2

mass; force

Question 3

Only objects that have huge amounts of ____________exert, or apply, gravitational forces that you can _________.

Answer 3

mass; feel

Question 4

Earth’s gravity is much ________________than the objects we see being pulled down.

Answer 4

stronger

Question 5

Gravity is a ________________force. It cannot be “turned off.”

Answer 5

constant

Question 6

Example: Think about being on a moving swing. Earth’s gravity will always pull you back _____________.

Answer 6

down

Question 7

Gravity exists between all objects in ______________.

Answer 7

space

Question 8

Stars stay in their _______________because of gravity.

Answer 8

galaxies

Question 9

Our sun has much more mass than Earth or the planets and objects that _____________around it.

Answer 9

revolve

Question 10

The gravity of the sun holds Earth and other objects in space in their _____________.

Answer 10

orbits

Question 11

Earth’s gravity holds the ____________ in its orbit.

Answer 11

moon

Question 12

Lesson 2:
an imaginary line that goes through the center of an object

Answer 12

axis

Question 13

objects or events that occur in the same order or manner

Answer 13

pattern

Question 14

the spinning of an object around its axis

Answer 14

rotation

Question 15

the movement of one object around another object

Answer 15

revolution

Question 16

An ____________ is an imaginary line that goes through the center of an object.

Answer 16

axis

Question 17

Earth’s axis passes through the ___________ Pole, the center of the Earth, and the _____________ Pole.

Answer 17

North; South

Question 18

Earth makes one complete ________________ about every 24 hours. One rotation is equal to about one __________ on Earth.

Answer 18

rotation; day

Question 19

As Earth rotates, different areas of the Earth face the ________.

Answer 19

sun

Question 20

The side of the Earth that faces toward the sun experiences _______. The side that faces away from the sun experiences ___________.

Answer 20

day; night

Question 21

During the day, the sun appears to rise in the ____________. Then, it “moves” across the sky and finally sets in the ___________.

Answer 21

east; west

Question 22

Earth’s motion around the sun is called a ______________.

Answer 22

revolution

Question 23

Earth takes about 365 days, or one ___________, to complete one revolution around the sun.

Answer 23

year

Question 24

As Earth revolves around the sun, places on Earth receive different amounts of _____________. A location gets more daylight in the ______________than it does in the winter.

Answer 24

sun; summer

Question 25

The tilt of Earth’s axis and Earth’s revolution around the sun causes ___________.

Answer 25

seasons

Question 26

Earth’s tilt and revolution affect how much direct __________________ different places on Earth receive at different times of the year.

Answer 26

sunlight

Question 27

Earth’s tilt causes the ________________ of the sun’s rays that Earth receives to change from season to season.

Answer 27

Angle

Question 28

Example: In ___________, the sun’s rays are spread out, so the weather becomes colder.

Answer 28

winter

Question 29

Example: In ___________, the sun’s rays are more direct, so the weather becomes warmer.

Answer 29

summer

Question 30

Lesson 3. a dark area or shape that is made when an object blocks a source of light

Answer 30

shadow

Question 31

a group of stars that, when seen, make a shape or pattern

Answer 31

constellation

Question 32

Earth’s ___________ and ________________ cause patterns in space.

Answer 32

rotation; revolution

Question 33

As Earth rotates, the _______ appears to move across the sky in an arc.

Answer 33

sun

Question 34

Sunlight shines on objects at different ____________ throughout the day. As a result, __________ change their size and position during the day.

Answer 34

angles; shadows

Question 35

How bright a star appears to people on Earth is related to its ____________.

Answer 35

distance

Question 36

From our perspective on Earth, stars move in ____________ways during the year. To help identify star patterns during different seasons, scientists can use _________________.

Answer 36

predictable; star maps

Question 37

The moon does not produce its own ___________. You can see the moon because _____________ reflects off the moon’s surface.

Answer 37

light; sunlight

Question 38

The changing pattern of the moon in the night sky is known as the moon’s __________.

Answer 38

phases

Question 39

One complete cycle of the moon phases takes about ___________days.

Answer 39

29.5