Science Exam Flashcards
(46 cards)
Identify products that come from forest resources.
Paper, medicine, nuts, and wood
What do you predict will happen if people use forest products faster than nature can replace the resources?
We will run out and it will become a nonrenewable resource.
In what ways do you use forest resources in your everyday lives?
I use paper when I write.
What is a mineral?
A mineral is a naturally occurring nonliving solid that in Earth’s crust
What is the main difference between a renewable resource and a non-renewable resource?
You can get renewable resources as fast as nature provides it, but nonrenewable resources take longer to access and pollute the Earth.
Why is carefully using renewable resources important?
It is important because if we were to run out of resources we would sadly DIE
Identify two energy sources that ancient people used.
Ancient people used burning wood and strong animals
Why do you think that coal, petroleum and natural gas are called fossil fuels?
These materials are made up of plants and animals’ fossils that died a
A long time ago and were compacted underground.
In what ways do you use non renewable resources in your everyday life?
WE use nonrenewable resources like natural gas and coal . We use coal when wee burn fire.
Name energy sources that can be transformed into electrical energy.
Wind ,hydroelectricity ,coal, solar.
Since geothermal energy (as well as solar energy and wind energy)is always available, why
Do you think we do not get ALL of our energy from these sources?
Because it takes time to drill through the rock, is expensive, and is in a hard location.
What kinds of energy do you use that ancient people also used?
We still burn wood and use the sun for energy
Why are wind and water energy usually converted to electricity before they are used?
Because they are easy to move through power lines.
What is the original source of most energy that people use?
solar
Which of Earth’s systems is made of rivers, lakes and oceans?
Hydrosphere
What is one positive effect of farming?
The aim of farming is to produce food for people
What is one negative effect of farming?
It replaces the types of organisms that normally live in an area
How do humans affect Earth’s natural resources?
We can pollute the resources
What is conservation?
Conservation is making the word and the environment better and safer
What are at least three ways you can reduce the amount of resources that you use in your daily life?
3 ways we reduce the resources that we use on our daily life is 1 you can turn off lights when you don’t need them 2 you can recycle instead of landfill because you produce more reusable stuff than trash 3 you can turn the water off in the middle of you brushing your teeth.
How do you recycle products at home.
I recycle paper at time because i produce a lot of paper that doesn’t need to go in the land fill
Define lightyear.
It is the distance light travels in a year 9 trillion 460 billion and 800 million km
How are temperature and brightness of a star related?
If the star is hotter its brighter if the star is not as hot its dimmer
What are two factors that affect how bright a star appears in the night sky?
ITs temperature and how far it is from the Earth.
