помогите пожалуйста, нужно до 12.06.2023
Earth formed from a cloud of ________, dust and rock.
gas
magma
stars

2. Early explorers used __________to find their way.
GPS instruments
stars
sun

3. Christopher Columbus was an explorer who discovered____________.
America
Australia
Africa

4. The water in our oceans is about 3.5% __________.
salt
minerals
bacteria

5. Igneous, sedimentary and metamorphic are types of____________.
volcanoes
crystals
rock

6. All the planets in our solar system__________the Sun.
axis
round
orbit

7. Coal, gas and oil are ___________.
fossil fuels
pollution
electricity

8. Glaciers ________ sunlight back into space.
give
reflect
send

9. Weather is the different conditions in the___________.
cloud
space
atmosphere.

10. There are different types of climate
because of the____________.
sun
moon
area

11. To make our planet clean we can _________more things.
recycle
reduce
throw away

12. Moss and fern are types of ________plants. Pine and redwood are types of_______.
non-seed/seed
non-seed/flowering
non-seed/conifers

13. How do we call the animals with no backbone?
predators
invertebrates
amphibians

14. The carbon dioxide is increasing the natural greenhouse effect and making
Earth warmer. This is called___________.
greenhouse effect
global warming
greenhouse period

15. These natural resources are ___________so they can replace themselves.
renewable
non-renewable
recycled

16. Today, scientists use ____________ to predict the weather, but in the past people watched nature.
navigators
sun and moon
computers

17. The land gets warmer during greenhouse periods. In the Arctic, there's a lot of ___________ in the frozen soil.
carbon dioxide
methane
oxygen

18. The problem is that these fossil fuels cannot be replaced, so when we have used them all, they will run out. They are called ____________ resources!
non-renewable
renewable
reducing

19. Only 3% of Earth's water is ____________.
frozen water
salt water
fresh water

20. A compass always points _________, so it tells you which direction you are travelling in.
south
west
north
east​