Chemistry Mixtures
A substance that cannot be broken down into simpler substances
Element
Hurricanes need ___ to form.
Warm ocean water
Matter can be neither created nor destroyed.
Law of conservation of mass.
Which waves are used in technologies such as cell phones, WiFi, and Bluetooth?
Microwaves
A push or pull on an object
Force
a thing that is composed of two or more separate elements; a mixture.
A Compound
What is the primary source of energy for our planet?
The sun
Is this balanced? CaO + H₂O --> Ca(OH)₂
Yes
What was the origin of the universe?
The big bang theory
What is used to measure force(in newtons)
Spring scale
Substance has these characteristics:
Corrodes metal
Sour taste
pH scale: 3
Litmus test turns red
What substance did the student test?
a. Water
b. Disinfectant
c. Orange juice
d. Baking soda
c. Orange juice
What is the Coriolis Effect?
Earth's spin causes winds to curve and change direction.
SnO2 + 2H2 --> Sn + 2H2O
How many atoms of tin(Sn), hydrogen(H), and oxygen(O) respectively are contained in the reactants of the chemical equation?
Sn: 1
O: 2
H: 4
What type of galaxy contains mostly old stars and little to no gas or dust?
Elliptical Galaxies
People sitting in a moving bus experience a push when the bus stops. This is due to...
Law of inertia
What is the pH of an acid and the base?
Acid: 0-6
Base: 8-14
What is the difference between high and Low pressure weather?
High pressure has fair weather, clear, sunny skies.
Low pressure has stormy, rainy, or cloudy weather.
Which formulas have the same number of hydrogen atoms? Select TWO correct answers.
a. H3PO4
b. Ca(OH)2
c. CH3OH
d. 2Mg(OH)2
e. CHCl3
C. CH3OH
D. 2Mg(OH)2
What color star is the hottest and the coldest?
Red(coldest)
Blue(hottest)
Andrea is rearranging her room. Assuming the floor is frictionless, what force does Andrea need to apply to the bed to cause it to accelerate 2 m/s2 to the left?
75kg(mass)
150 N
What property allows organisms/insect to walk on water?
Surface Tension
How does air move?
From areas of higher pressure to areas of lower pressure.
How many grams of sodium acetate are produced?
CH3COOH + NaHCO3 ---> NaC2H3O2 + CO2 + H2O
15g 23g ? 10g 8g
20g
Which category would the SUN be located in on the HR Diagram?
Main sequence
During field day, a group of students play tug-of-war with a rope that has a mass of 5kg. What is the acceleration of the rope?
40 N Left 60 N Right
a. 50m/s2 left
b. 12 m/s2 right
c. 8 m/s2 left
d. 4m/s2 right
d. 4 m/s2 right