Scientific Method
An educated guess
Hypothesis
SI base unit of length
meters
How do you classify sugar (C6H12O6)
Compound
Process of converting solid to gas?
sublimation
The study of the composition of matter and the changes it undergoes
Chemistry
Homer notices that his shower is covered in a strange green slime. His friend Barney tells him that coconut juice will get rid of the green slime. Homer decides to check this out by spraying half of the shower with coconut juice. He sprays the other half of the shower with water. After 3 days of "treatment" there is no change in the appearance of the green slime on either side of the shower.
What is the Independent Variable?
Coconut juice
20 kilometers(km) is _____________ meters (m)
Matter that consists of more than 2 elements.
compounds
How do you classify the size of matter, extensive or intensive property?
Extensive property
What is matter?
Anything that has mass and volume.
The standard to which you compare the results of an experiment is called
Control Variable
150 weeks(wks) is equal to ___________ hours (hrs)
25,200 hrs
has indefinite shape but definite volume and takes the shape of the container
LIQUID
Which of the following is an example of physical property?
Density, flammability, neutralizing a base, toxicity
density
What is the difference between between Mass and Weight?
Mass is what matter is composed of while weight is mass plus the effect of gravity.
During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the
Independent Variable
22,647 inches(in) is __________ kilometers(km)
0.58 km
Classify the following:
1. apple cider
2. hydrogen peroxide (H2O2)
3. salad dressing
1. Mixture
2. Compound
3. Mixture
Physical or Chemical change?
Frying egg
Chemical Change
It is the simplest form of matter.
Element
If you give high school students snacks while they work on math problems, then they will complete the math problems quicker because snacks help you concentrate. You separate high school students into two groups and only give snacks to one of the groups. You then assign 20 of the same math problems to complete and record time how long it takes them.
Give the following:
Control:
Dependent:
Independent:
Control: group without snacks
Dependent: time it takes to complete the math problems
Independent: snacks while completing the math problems
How many cups are in 2.5 liters (L) of a liquid?
2.64 cups
It has indefinite shape and indefinite volume and takes the shape and volume of its container.
Gas
Give 2 indicators of chemical change
Unusual change in temperature
Evolution of a gas (bubbles!)
Formation of precipitate
Change in smell
Change in color
What is a mixture?
Matter consists of 2 or more components and are physically blended.