Nature of Science
What is a hypothesis in an experiment?
An educated guess or prediction about what you think will happen.
Name a function of the human skeleton
Protect organs, support and movement
What is an element?
Substance made of one type of atom
Name a renewable energy
Wind/sun/tidal/etc
Name another planet in our solar system OTHER THAN EARTH
Any acceptable planet
Name one safety rule that should be followed when using a Bunsen burner
Goggles worn and tie back long hair
What is Photosynthesis?
The process where green plants use light, carbon dioxide and water to make their own food
Name 3 states of matter
Solid, Liquid, Gas
What instrument do we use to measure temperature?
Thermometer
What causes night and day on planet earth?
The rotation of the planet over 24 hours
Why is it important to repeat experiments many times?
To ensure results are reliable and to see if the are any abnormalities.
Describe the role of enzymes in digestion
Enzymes break down big food molecules into smaller ones so the body can absorb them easier
Explain the law of conservation of mass
Or
The total mass of reactants equals the total mass of products
How do we measure density of a regular shaped object
find volume and divide by mass
Describe what fossils tell us about the past
Evolution, animals that died out
Keep all variables the same except one that you are testing
Large surface area, chlorophyll, and stoma for gas exchange
Describe how to separate salt from seawater
Evaporation - heat until water evaporates, leaving salt behind
Explain the way we calculate voltage, current and resistance
Voltage = current x resistance
Explain how greenhouse gasses impact earths climate
They cause a heating layer/blanket that causes the planet to heat up by trapping in the suns rays/radiation
Design an investigation to test the effect of light on seed germination, and list your variables and controls.
Use two identical trays of seeds, put one in light and one in darkness. Keep water/temp/seed type the same. Light is independent variable, growth is dependent variable, seeds in normal light is control
Compare processes of sexual and asexual reproduction in plants
Sexual : two parent plants, produces variation
Asexual : involves one parent, produces identical offspring
Describe a simple particle diagram showing solids, liquids and gasses.
Solids- close, Liquids- less close, moving more, gasses - far spaced, lots of erratic movement
A car travels 120km in 2hrs and then 60 km in 1 hr, calculate its average speed
Avg speed ; 180 divided by 3 = 60km/h
What are some advantages or disadvantages of space exploration?
Adv - New technology, job creation, potential for resource mining
Disadvantage - High Costs, space debris and trash, environmental impact of launches