SCI-Blitz Words
What vocabulary word goes with this definition?
Subatomic particle with no charge that is found inside the atom’s nuclei.
Neutron
Fill in the blank.
Matter ________ be created or destroyed during a physical or chemical change.
Cannot
Does a new substance form when there is a physical change?
No.
True or False.
A pure substance can be separated physically.
False.
A pure substance can be seperated chemically.
Pure water has a pH of 7. Pure water _______.
A. is a base
B. is a neutral substance
C. could be either an acid or a base
D. is an acid
B. is a neutral substance
What vocabulary word goes with this definition?
Theory that all matter is made up of tiny particles called atoms. The atoms of each element are identical but different from other elements
Atomic Theory
How many elements are in the following formula?
FeS
2
True or False.
A chemical change is reversible.
False
Which is the stronger acid?
A. pH 1
B. pH 4
C. pH 8
D. pH 13
A. pH 1
A student was assigned to take water samples from a lake near his home. He measured the pH of one of the water samples to be 5.0. Which of the following best describes this sample of water?
A. Highly acidic
B. Slightly acidic
C. Highly basic
D. Slightly basic
B. Slightly acidic
What vocabulary word goes with this definition?
Formed when two or more atoms chemically combine
Molecule
True or False.
Amount of matter before a reaction is Equal to the amount of matter at the end of a reaction.
True
Name three evidence of a physical change.
Bending
Crushing
Dissolving
Phase change (melting, boiling, freezing, sublimation, condensation)
Which of the following is the BEST example of a homogeneous mixture?
A.Lemonade made of water, lemonade powder mix, and sugar.
B.An omelet made of scrambled eggs, spinach and cheddar cheese.
C.Trail mix made of raisins, peanuts, and chocolate candies.
D.A glass of ice water made of ice cubes and pure water.
A.Lemonade made of water, lemonade powder mix, and sugar.
A Ph closer to 0 is considered to be ______
A. Highly acidic
B. Slightly acidic
C. Highly basic
D. Slightly basic
A. Highly acidic
What vocabulary word goes with this definition?
Contains only one type of particle or molecule
Pure Substance
In an Open System, does matter interact or exchanged with the outside environment?
Yes.
To make cookie dough, Ella mixes together ingredients including oats, raisins, eggs, sugar, and flour. Then, to make cookies, Ella bakes the cookie dough in an oven. Which of the following best describes the change from cookie dough to cookies?
a.A chemical change caused by a change in temperature.
b.A physical change caused by a change in temperature.
c.A chemical change caused by mixing of ingredients
d.A physical change caused by a mixing of ingredients.
A.
What are two the two types of mixtures?
Homogeneous and heterogeneous
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
A. strongly acidic
B. slightly acidic
C. strongly basic
D. slightly basic
D. slightly basic
What vocabulary word goes with this definition?
Smallest unit of an element and are made of subatomic particles
Atom
Is a bike rusting outside an example of an open system or closed system?
Open System
1. Which of the following is an example of a chemical change?
A. Dissolving table salt in water.
B. Drops of water forming on a cup of iced tea on a hot day.
C. Melting gold to make jewelry.
D. An old penny rusting.
D. An old penny rusting.
True or False.
A mixture is something that CAN be broken down into simpler materials using physical methods.
False
What would be considered the weakest base?
A.8
B.14
C. 7.8
D.11.6
C. 7.8