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NS T4 Exam Grade 7
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Name 2 adaptations animals and plants have to live in the high tide zone.
A shell and suckers.
Name two important things we get from photosynthesis.
Oxygen and Glucose sugar
Describe the life of the San tribe in summer.
Lived in small groups because there was a lot of food available.
Why was it important for the San people to know when it was going to be full moon?
They went hunting when it was full moon because there was more light to see.
When do we get spring tide?
When the moon and the Sun are aligned with the Earth.
Correct the following: The summer in the Southern Hemisphere starts in JANUARY.
The summer in the Southern Hemisphere starts in December.
Correct the following: The Northen Hemisphere has WINTER in June.
The Northen Hemisphere has summer in June.
Correct the following: The Northern Hemisphere has AUTUMN in March.
The Northern Hemisphere has Spring in March.
Correct the following: The Southern Hemisphere has spring in MARCH.
The Southern Hemisphere has spring in September.
Correct the following: The Southern Hemisphere has WINTER in December.
The Southern Hemisphere has summer in December.
The part of the Earth above the ... is known as the Northern Hemisphere.
Equator
The side of the Earth facing the Sun experiences... and the other side of the Earth facing away experiences ...
Day / night
The Earth ... around its own axis once per day.
Rotates
These two siblings made a model of 90 000 stars.
William and Caroline Herschel
He improved the telescope.
Galileo Galilei
He theorized that the Sun is in the middle of the solar system and not the Earth.
Copernicus
He discovered that the planets orbited the Sun in an elliptical pattern.
Johannes Kepler
He discovered that gravity was keeping the planets in their orbits.
Isaac Newton
Factors that affect an objects gravity are ...
Mass and distance
We use the ... calendar.
Gregorian
... are the predictable, repeated rise and fall of the sea and ocean levels.
Tides
... is the amount of matter in an object.
Mass
Soil, dust and other matter that settles to form a layer at the bottom of a liquid.
Sediment
During photosynthesis plants use ... to absorb light energy and change it to glucose.
Chlorophyll
... rays are focused on a wide area and are therefor less intense than direct rays.
Oblique
The imaginary line above the equator.
Tropic of Cancer
The Earth is tilted at an angle of ...
23,5 degrees
Electricity: The ... that turn switches on the generators.
Turbines
Electricity: Coal is ... and set on fire.
Grinded
Electricity: The steam moves down pipes and turns a ...
Turbine
Electricity: The fire heats up water and forms ...
Steam
Electricity: The generator works with magnets that changes ... energy to electrical energy.
kinetic
Is the following an example of potential or kinetic energy: A dog runs after a ball.
Kinetic energy
Is the following an example of potential or kinetic energy: A dancer jumps in the air.
Kinetic energy
Is the following an example of potential or kinetic energy: A pencil is lying on the edge of a table.
Potential energy
Is the following an example of potential or kinetic energy: A taxi stops to pick up passengers.
Potential energy
Give an example of conduction.
A pot of water on the stove top.
Give an example of convection.
An air conditioner that cools or heats up a room. A fire that heats a room. Any good answer.
Give an example of radiation.
Sun shining, Any good answer.
Name 3 heat transfer methods.
Conduction, convection, radiation.
Peat experience more pressure and moves closer to the center of the Earth. The ... changes the peat into fossil fuels.
Heat
There was a lot of pressure on the dead matter and it changed into ...
Peat
Millions of years ago, plants in swamps absorbed ...energy from the Sun.
Light
Energy that is stored in a system.
Potential energy
Keep items cold because they slow down heat transfer from the environment.
Heat insulator
Energy that causes a change in motion.
Kinetic energy
A fuel that formed underground from living material millions of years ago.
Fossil fuels
Energy from moving water.
Hydroelectricity
A small device that converts mechanical kinetic energy into electrical energy.
Dynamo
What energies are wasted in a drilling machine?
Heat and sound energy
A pot of soup that is heated on a stove is an example of a... system.
Thermal
What is the unit of measurement of potential energy?
Joule
Name 3 examples of non-renewable energy sources.
Coal, oil, gas, uranium, nuclear fuels
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