When you stick a spoon in a hot bowl of soup, what will happen to the spoon?
Temperature will increase
100
Building a ___________ is a way that scientists can share information or show an idea.
model
100
True/false Having skepticism means you have doubt about something
true
200
Why do scientists conduct repeated trials?
to make sure data is accurate
200
(T/F) In an observational study, variables are manipulated.
FALSE! Only in experiments are variables changed. Observational studies involve observations only.
200
Which type of light from the electromagnetic spectrum has the most energy?
gamma!
200
Why does sound move better through wood than through air?
molecules are closer together/ more compact
200
As energy enters a system and a solid moves to a liquid then to a gas, what happens to the speed of the molecules?
They move faster and become more spread apart.... They expand!
300
A proper hypothesis is written in this format
if/then format
**If fertilizer affects plant growth THEN ....**
300
If an experiment cannot be replicated, what can we assume about the experiment?
it is faulty, wrong, etc.
300
What determines the color of a visible light wave?
wavelength
300
What is the formula for density?
Density = mass/volume
300
____________ is the ability to do work
energy
400
Dependent variables belong on the _________ axis
x axis
400
When another scientist conducts your experiment, it is called...
Replication
400
Convection is heat transfer through water or _____________.
air
400
Convert. 650 mm=_________cm
65
400
If an object is purple, what color light(s) are/is being reflected?
Blue and Red
500
Sarah is testing the effect of fertilizer on soil. She has 2 groups of plants, 1 with fertilizer which is in full sun and 1 without fertilizer in shade. This is a problem! It is called experimental _____________.
experimental bias.
500
If a scientist wants to test the affect of fertilizer on plant growth, what are some variables that should be controlled?
Water, sunlight, soil type, etc.
500
Sound would travel best through which of the following... air, metal, or wood?
metal
500
How do you find the VOLUME of an irregularly shaped object?
water displacement
500
A wooden rectangle is 2cm x 6cm x 1 cm. It's mass is 4 grams. What is its density?