C3.1.4 - Nanoparticle Safety Flashcards
Sunscreen contains which type of nanoparticles?
Zinc oxide
Why is sunscreen containing zinc oxide nanoparticles better than that containing normal sized zinc oxide?
The sunscreen with normal sized zinc oxide in it looks white on the skin.
What does it mean when we say a test is valid?
It is a fair test
How can scientists carry out a valid (fair) test?
Keep control variables the same for every experiment
Are zinc oxide nanoparticles harmful to human health?
No
What effect do diesel car fumes have on mice?
It increases their cholesteorl level
What is cholesterol?
A fatty deposit that can build up in blood vessels.
What can high cholesterol lead to?
Heat disease
Heart attacks
Stroke
What is the independent variable in an experiment?
The thing that is changed.
What is the dependent variable in an experiment?
The thing that is recorded (measured)
What is the control variable in an experiment?
Things that are kept the same to make the experiment valid (fair)
How can we make an experiment more reliable?
Repeat it
Get someone else to repeat it.
Which axis does the independent variable go on when drawing a graph?
X - Axis
Which axis does the dependent variable go on when drawing a grap?
Y - Axis
