Matter and Atoms
True or False
Protons are negatively charged
False
Is this a physical or chemical reaction?
Water evaporating due to heat
Physical
True or False
Water and Sunlight are biotic factors
False
What the order of the water cycle?
evaporation, transpiration, condensation, precipitation, and runoff
Name at least 3 renewable energy sources
Solar, wind, hydro, biomass, geothermal, and tidal energy are all examples of renewable energy sources
What is Matter?
Matter is anything that has mass and takes up space
True or False
A bike chain rusting is a physical change
False (Rusting is a chemical reaction)
What does abiotic mean?
Abiotic means non-living. It refers to things that are not alive or part of a living organism
How old do scientists think the Earth is?
around 4.54 billion years old
What is a non-renewable energy source and what is a renewable energy source?
A non-renewable energy source means that one cannot replenish fast enough to keep up with its consumption. A renewable energy source is a source that can be reused multiple times.
What are 3 states of matter?
solid, liquid, gas (+plasma)
What is the difference between a chemical process and a physical process in chemistry?
How do producers get energy?
Photosynthesis
How much does the hydrosphere cover the Earth?
Around 71%
What does fossil fuel plants do?
Fossil fuel power plants burn coal or oil to create heat which is in turn used to generate steam to drive turbines which generate electricity.
Q: What are the three main subatomic particles in an atom, and what are their charges?
Protons (positive), neutrons (neutral), and electrons (negative)
What is an example of a physical change that can't be reversed?
an egg being cracked, wood being ground into sawdust, making of curd from milk, etc
What type of organism is at the top of the food chain?
Apex predators (animals with no other predator other than humans)
What are the 5 systems of the Earth?
geosphere, biosphere, cryosphere, hydrosphere, and atmosphere
What is one thing we are using as renewable energy?
wind and solar energy are used more often
What determines the identity of an element?
The number of protons in the nucleus (atomic number)
What are the main types of chemical reactions?
What are the different types of ecosystems
forest, grassland, desert, tundra, freshwater, marine, and urban ecosystems
What is salinity?
Salinity is the measure of the total dissolved salt content in a body of water/ amount of salt in the water
How does solar energy work?
When the sun shines onto a solar panel, energy from the sunlight is absorbed by the PV cells in the panel. This energy creates electrical charges that move in response to an internal electrical field in the cell, causing electricity to flow.