U1M1
When particles are bonded strongly and close together, what state of matter is it in?
SOLID
Which model shows that atoms are conserved in the reaction?
1. CH4 + O2 → CO2 + H2O
2. CH4 + O2 → CO2 + 2H2O
3. CH4 + 2O2 → CO2 + 2H2O
4. 2CH4 + O4 → 2CO2 + 2H2O
3
What is Pangea?
It was a supercontinent that existed over 250-350 million years ago.
What are the three major groups of the periodic table?
Metals, non-metals, and metalloids
Juana is creating a lab simulation about the movement of the particles in a nonmetal gas. The user can change the pressure in the gas temperature and see the effect of the change in the gas volume. What changes should Juana program to cause the decrease in the gas' volume?
Increase pressure, decrease temperature
Kinetic Energy + Potential Energy = ?
Thermal Energy
How many atoms of Hydrogen are in this chemical equation?
N2 + 3H2 → 2NH2
10 Hydrogen atoms
What theory explains how new crust is created at mid-ocean ridges?
What is the difference between endothermic and exothermic reactions?
Endothermic: Absorbs heat
Exothermic: Releases heat
Which of these are a chemical change?
A. Bending a pop can
B. Evaporating of milk
C. Melting wax
D. Burning paper
D
Why does oil not dissolve in water?
Oil is nonpolar and water is polar, nonpolar substances dissolve easily in nonpolar substances & polar substances dissolve easily in polar substances.
You have a rock with a volume of 5cm3 and a mass of 10g. What is its density?
The density is 2g/cm3
What plate boundary forms mountains?
Convergent
Give one example of quantitative data and qualitative data.
Quantitative date: Numerical
--> Age
Qualitative date: Involves your 5 senses
--> Color
Which two continents have the most obvious fit of the coastlines?
South America and Africa
What is the states of matter determined by?
The motion of the matter's particles and the forces between them.
Heat/ Temperature also helps
What is the law of conservation of mass?
The total mass before a chemical reaction is the same as the total mass after the reaction.
or mass is not created nor destroyed.
How do Igneous rocks form?
When hot rock cools (lava or magma)
What is the difference between an molecule and compound?
molecule: a group of 2 or more atoms held together by chemical bonds
compound: a substance formed by two or more different types of elements
What are the three types of rocks?
Igneous, metamorphic, and sedimentary
If compound A is composed of 50% oxygen and 50% carbon, what is the ratio?
1:1 or 1 oxygen atoms to 1 carbon atom
What are the reactants for this reaction:
2H2 + O2 --> 2H2O + Energy
The left side or 2H2 + O2
Why do Earthquakes happen?
They happen when underground rock "breaks or snaps" and there is rapid movement along the fault.
How would the pressure of the gas in an air tank change if more gas particles are added?
As volume increases, pressure decreases & when volume decreases, pressure increases.
What is the difference between nonpolar and polar bonds?
What is polar is a type of covalent bond where atoms share electrons unequally. Nonpolar is a type of covalent bond where atoms share electrons equally.