Chapter 3 Flashcards
What is weight measured in?
Newtons
The force of gravity on an object is called____
Weight
The contact force is always equal to the weight of the object when the surface is____
not moving
Give the correct order of the Solar System
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Draw the diagram of the Solar System
ANS: Y7 Textbook pg 86
What are all the facts about the Solar System
-All planets in the Solar System orbit around the Sun in the same direction.
-All the planets orbit the Sun in the same plane
-The direction of spin of the Sun and the planets is the same as the direction in which the planets orbit the Sun
To keep the planets moving in a circle, there needs to be a force causing it to turn.
If this force did not act, What would happen?
The planet would travel off in a straight line into space
Which planet has the strongest pull from the Sun’s gravity?
Mercury
What causes Mercury to orbit with the highest speed of all the planets?
Mercury being the closest planet to the Sun
What is air resistance?
Force that acts in the opposite direction to the movement that pushes against against the particles in the air.
What are depth in terms of ocean
the distance from the surface of the water to the bottom of the ocean
What is the change in depth of the water called?
a tide
What is the difference in depth of the water between high and low tides called?
Tidal Range
Tides causes the land to change in height through the day, this is an example of and called______
Earth Tide
High tides are about how many hours apart?
12 hours
Low tides are about how many hours apart?
12 hours
The time between high and low tide is how long?
six hours
What causes tides?
The Moon that orbits the Earth has a gravity that pulls on the Earth
What is the pull from the Moon’s gravity called?
Tidal force
The Sun’s tidal force on the Earth is weaker or stronger than the Moon’s tidal force
weaker
What causes the Sun’s tidal force to be weaker than the Moon’s tidal force
The Sun is further away from Earth than the Moon
What will happen if the water in the harbour is not deep enough?
Boats cannot move safely.
What happens if the harbour contain no water at low tide?
Boats cannot move at all
What are harbours?
Harbours are places where boats and ships can load and unload passengers and cargo.
What are the condition of coastal areas during weather with strong winds
Coastal areas are more likely to have flooding at times of high tides.
What are Coastal Areas?
Coastal areas are parts of the land that are close to the oceans.
Why can the flow of water in and out of some coastal areas be dangerous for small boats?
Flooding can occur at coastal areas at times of high tides when there are weather with strong winds.
What may tides affect, followed by examples.
Tides may affect food chains, including the human food chain.
For example, at low tide birds can eat some types of shellfish when they are not covered with water, some types of fish move to find food according to tides in coastal areas.
What are linked with earth tides?
Volcano eruptions and Earthquakes.
Description of kinetic energy
energy stored due to movement of an object.
Description of chemical energy
energy stored in food, batteries, chemical fuels such as wood,oil and coal.
Description of thermal energy
heat energy stored in hot objects and transferred to colder objects.
Description of elastic potential energy
energy stored when things are stretched or squeezed to change their shape.
Description of gravitational potential energy
energy stored when an object is lifted away from a source of gravity.
Description of electrical energy
The flow of current in applications or circuits.
Description of sound energy
energy transferred from vibrating objects.
Description of light energy
visible energy from luminous objects.
What is the state of energy before it is changed or transferred?
It is stored.
What does dissipated energy mean
Energy that spreads out where there is no use for it.
