Skills
What is the name for a variable that is kept the same?
Controlled Variable
Define a mixture.
2 or more different elements, not chemically bonded together.
Draw the symbol for a voltmeter
V (in a circle)
The reactants in a reaction are always on the ________ of the equation.
left
Differences between individuals of the same species is called ________
Variation
What is the name for a variable that is changed during an investigation?
Independent Variable
What is volume?
The amount of space something occupies
What equipment is used to measure current?
an Ammeter
What type of reaction releases heat/energy?
Exothermic
What is name for something in a food chain than eats the plants at the bottom of the food chain?
A primary consumer
What equipment is used to measure short distance?
A ruler
How can you decrease the concentration of a solution?
Add water
State the unit for electrical current
Amperes (Amps)
What is thermal decomposition?
A reaction where heat is used to break down a substance
State a resource that organisms compete for.
Food, water, shelter, mates
What is the name for a variable that ismeasured during an investigation?
Dependent variable
What is solubility?
How easily something dissolves
What type of charges are attracted to negative charges?
Positive charges
What type of reaction absorbs heat/energy?
endothermic
What is an ecosystem?
A habitat and the species that live there.
State a controlled variable for an investigation to see which of some different metals react with acid the most violently.
temperature, concentration of acid, type of acid, mass of metal, surface area of metal.
How does surface area affect how quickly something dissolves?
A greater surface area will make something dissolve more quickly
How does the resistance of a circuit affect the current passing through it?
A greater resistance will cause the current to be lower.
How do the masses of the reactants and the products in a chemical reaction relate to one another?
In any chemical reaction, the mass of the products is equal to the mass of the reactants
When an arrow points towards something on a food web, what does this represent?
The direction of energy transfer