
Our Planet Earth
Explore Earth's continents, oceans, and weather, from familiar facts to surprising discoveries.
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Questions with solutions-
1. Vælg det rigtige svar.
What does ocean water usually taste like?
- Sweet
- Salty
- Sour
Show solution
- Salty
Ocean water contains salt. Rivers carry small amounts of salt from rocks into the sea.
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2. Vælg det rigtige svar.
Which continent is Brazil in?
- South America
- Europe
- Asia
Brazil is on the same continent as Argentina.
Show solution
- South America
Brazil is the largest country in South America. Much of the Amazon forest is there.
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3. Udfyld det tomme felt.
On a very cold day, soft white flakes of ___ can fall from clouds.
- rain
- fog
- snow
It can cover the ground in white.
Show solution
On a very cold day, soft white flakes of snow can fall from clouds.
Snowflakes have different shapes, but they usually have six sides or six arms.
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4. Vælg det rigtige svar.
Which ocean is the largest?
- The Atlantic Ocean
- The Pacific Ocean
- The Indian Ocean
It lies between Asia and the Americas.
Show solution
- The Pacific Ocean
The Pacific Ocean covers more space than all of Earth's land put together.
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5. Vælg det rigtige svar.
What makes a place a desert?
- Hot weather all year
- Sand covering all the ground
- Very little rain or snow
Think about how much water falls from the sky.
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- Very little rain or snow
Some deserts are cold, and some have more rock than sand. Deserts are dry, not always hot.
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6. Vælg det rigtige svar.
When it is summer in Canada, what season is it in Australia?
- Winter
- Summer
- Spring
Canada is north of the equator. Australia is south of it.
Show solution
- Winter
The northern and southern halves of Earth have opposite seasons. Christmas is in summer in Australia.
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7. Vælg det rigtige svar.
Which continent is mostly covered by thick ice?
- Africa
- Antarctica
- Europe
The South Pole is there.
Show solution
- Antarctica
Antarctica's ice lies on land. In contrast, much of the ice around the North Pole floats on the ocean.
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8. Udfyld det tomme felt.
Clouds are made of tiny drops of water or small pieces of ___.
- salt
- rock
- ice
High above the ground, the air can be very cold.
Show solution
Clouds are made of tiny drops of water or small pieces of ice.
A cloud can contain ice even when the weather on the ground is warm.
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9. Vælg det rigtige svar.
A mountain under the ocean grows until its top rises above the water. What does the land above the water become?
- An island
- A lake
- A valley
Water surrounds this new land.
Show solution
- An island
Some islands form when hot rock comes up from inside Earth and builds an underwater mountain.
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10. Vælg det rigtige svar.
The ocean rises and falls along a beach each day. What mainly causes this?
- The heat of the sun
- Rain falling over the land
- The pull of the moon
Think about the nearby object that moves around Earth.
Show solution
- The pull of the moon
These changes are called tides. The sun also pulls on ocean water, but the moon has a stronger effect on tides.
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11. Udfyld det tomme felt.
The sun warms ocean water. Some water becomes a gas and rises into the ___.
- sand
- air
- ice
This is the space above the ocean.
Show solution
The sun warms ocean water. Some water becomes a gas and rises into the air.
This change is called evaporation. The salt stays behind when ocean water becomes a gas.
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12. Vælg det rigtige svar.
Two places are on the same mountain: one near the bottom and one near the top. Which is usually colder?
- The place near the top
- The place near the bottom
- Both are always equally cold
Think about where snow often stays on a mountain.
Show solution
- The place near the top
Air usually gets colder as you go higher. This helps explain why some mountains have snow even in summer.
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13. Vælg det rigtige svar.
During a storm, why do we usually see lightning before we hear thunder?
- Thunder starts several seconds after lightning
- Lightning happens much closer to us than thunder
- Light travels faster than sound
Both come from the same event, but they reach us at different speeds.
Show solution
- Light travels faster than sound
Lightning heats the air very quickly. This produces the sound we call thunder.
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14. Vælg det rigtige svar.
Why can places near the sea have cooler summers and warmer winters than places far from the sea?
- Water in the sea changes temperature faster than land
- Water in the sea changes temperature more slowly than land
- Water in the sea stays at the same temperature all year
The sea can keep heat for a long time.
Show solution
- Water in the sea changes temperature more slowly than land
In winter, the sea gives some of its stored heat to the air nearby.
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15. Vælg det rigtige svar.
A place usually has warm summers, but one summer day is cold. What does this tell us?
- The weather is cold that day
- The climate has changed in one day
- Winter has started early
One unusual day does not describe many years.
Show solution
- The weather is cold that day
Weather can change from day to day. Climate describes the usual weather over many years.