Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
23 Cards in this Set
- Front
- Back
|
The equation for weight of an object: |
Weight = mass x gravity |
|
|
Why does the Earth orbit the Sun? |
A gravitational force of attraction keeps the Earth in orbit around the Sun. Sun has lots of mass ➡ lots of gravity, so Earth continues to orbit. |
|
|
What are the forces of attraction due to gravity related to? |
The mass of an object. NOT THE WEIGHT. |
|
|
Where does the sun rises and set in? |
The sun rises in the east and sets in the west. |
|
|
When is the sun the highest in the sky? |
At noon |
|
|
What causes seasons? |
The tilt of its axis related to the position of the Earth in its orbit around the Sun. |
|
|
How long does it take the Earth to revolve around the Sun? |
One year. |
|
|
True or false: the tilt of the Earth always points in the same direction? |
True |
|
|
What causes summer? |
Hemisphere is tilted towards the Sun: more direct sunlight (concentrated) + longer days = warmer |
|
|
What causes winter? |
Hemisphere tilted away from the Sun: sunlight is spread out (diffuse) + shorter days = colder |
|
|
How long does it take the moon to revolve around the Earth? |
One month. |
|
|
Why do we see the moon? |
Because e it reflects light from the sun. |
|
|
Why do we see the moon? |
Because it reflects light from the sun. |
|
What phase of the moon is this? |
New moon |
|
What phase of the moon is this? |
First quarter |
|
What phase of the moon is this? |
Full moon |
|
What phase of the moon is this? |
Third quarter |
|
|
How are tides caused? |
By the gravitational pull of the Moon (and Sun) on the ocean making a bulge in the water. |
|
|
High tides |
When water comes further up the land than normal because this part of the land is directly below the bulge. |
|
|
Low tides |
When water goes further away the land than normal because others parts of the land is directly below the bulge. |
|
|
How many high tides and low tides are there a day? |
2 |
|
|
What is a spring tide? |
The high tides are bigger and the low tides are lower than normal. |
|
|
What is a Neap tide? |
The high tides are not as high as usual and the low tides are not as low as usual. |
