Year 7 Science
Variables that are kept the same
The ultimate source of energy in ecosystems
The sun
3 states of matter: solid, liquid & ---
Gas
A force is defined as:
a) A push or a pull
b) Something moving
A) A push or a pull
Earth takes how long to spin on its axis?
24 hrs
The variable that is changed in an experiment
Independent variable
How many branches/options does each question on a dichotomous key have?
2
The process of turning a solid into a liquid.
Melting
Force that pulls objects of Earth
Gravity
True or false: The Moon affects the Earth's tides
True
The variable that is measured in an experiment
(F,R,M,A,B)
The technique used to separate sand from water.
Uses a funnel & special type of paper.
Filtration
When forces are equal in size and opposite in direction they are ______________?
A ________ eclipse occurs when the moon blocks the sun
Solar
What do all good experiments start with?
Asking a question OR hypothesis OR a research question
What are organisms that break down dead materials and recycle nutrients called.
Decomposers
In a saltwater solution. Is salt the solute or the solvent?
Solute
Newton's Law says for every action there is....
an equal and opposite reaction.
The tides with the largest difference between high tide and low tide are called _____________ tides.
List the 6 steps for lighting a bunsen burner.
(Assume hair is tied back already & all PPE is on)
1. Check the gas hose.
2. Connect the rubber hose to the gas tap securely.
3. Make sure the air hole is CLOSED (safety flame).
4. Light the match
5. Hold the match slightly above and to the side of the top of the barrel.
6. Turn on the gas gently at the gas tap.
What are the 7 classifications in the Linnaean classification system?
(K,P,C,O,F,G,S)
kingdom, phylum, class, order, family, genus, species
Process of a gas turning into a liquid
Condensation
List correct order for the phases of the moon, starting from new moon.
New Moon → Waxing Crescent → First Quarter → Waxing Gibbous → Full Moon → Waning Gibbous → Last/Third Quarter → Waning Crescent