Write standard form of this scientific notation.
3.41x10^-3
0.00341
100
Water is element. (true/false)
False, water is compound. H2O
100
What is state of your hair?
Solid
100
In phase diagram, gas, solid and liquid can exist together. We call that point as a ______________________.
Triple point.
100
What is formula of density?
d=m/v
200
What is scientific notation of this standard form?
5 217 000
5.217x10^6
200
Hydrogen gas (H2) is compound. Because there are 2 hydrogen atoms. (true/ false)
False ( H2, there are 2 atoms,but there is just 1 type of element. So, H2 is element.)
200
What is state of oxygen?
Gas
200
Which one is chemical change?
Baking a cake /
Dying hair /
Tearing paper
Baking a cake
Dying hair
200
45x10^3 is wrong scientific notation. Because___________________.
What is correct scientific notation?
Coefficient should between 1 and 10 (less than 10). So it can't be 45.
4.5x10^4
300
How many sig digs in this number?
1 000 204 510
9
300
Pizza is heterogeneous mixture. (true/false)
True
300
What is states of gasoline?
Liquid
300
We call physical change as a r________ change.
reversible
300
What is correct order of scientific method?
a)Perform controlled experiment
b) State the problem in the form of a question (use observations)
c) Form a hypothesis
d)Draw conclusion (theory)
b) c) a) d)
400
How many sig digs in this number?
0.000 000 200 12
5
400
We can cut or separate heterogeneous mixture equally.
(true / false)
False ( we can't cut or separate heterogeneous mixture equally. But we can cut or separate homogeneous mixture).
400
Which states has the highest energy at same temperature?
Solid, Liquid, Gas.
Gas
400
What is name of phase change solid to gas?
sublimation
400
This number, 0.000007 has 1 sig digs. Because of ____________.
Leading zero never count as sig digs.
500
What will you get when you multiply the number of sig digs?
a) 547 b)2.1120 c) 0.00001
3x5x1=15
500
What are 2 categories belong to matter?
pure substance, mixture
500
Write 3 examples of plasma.
Lightning, star, fluorescent lamp
500
What is name of phase change from gas to plasma?
Ionization.
500
A book has a mass of 560 grams and occupies a volume of 70 cm3. What is its density?