Module 1
What is physical science the study of?
Nonliving
This is a testable statement or prediction that can be tested in a controlled experiment.
False
Where is almost all of the mass of an atom found?
Protons
Electrons
Nucleus
Nucleus
Which one of the following is an important feature for a good hypothesis?
It must be testable
It should always include measurements
It should be broad
1. It must be testable
the gathering of information using senses or with the aid of instruments.
Observations
What type of observation is made when I say the ball is red?
Qualitative
Cereal and milk is an example of a homogeneous / heterogeneous mixture
Heterogeneous mixture
Which electrons have the greatest energy?
A. The electrons in the first energy level
B. The electrons in the second energy level
C. The electrons in the third energy level
C. The electrons in the third energy level
Baking a cake is an example of a physical or chemical change?
Chemical change
A pure substance containing two or more elements chemically joined in a fixed proportion.
Compound
What type of observation is made when I say the ball is 2in tall?
Quantitative
Salt water is an example of a homogeneous / heterogeneous mixture
Homogeneous mixture
True or False
Elements in the same group (column) of the periodic table have similar properties.
True
All atoms of an element have the same
Atomic number/ number of protons
A homogeneous mixture made by dissolving one substance in another.
Solution
Which of the following is an example of physical science?
Counting tree rings on a stump
Identifying the body segments of an ant
Measuring a car’s speed
Measuring a car’s speed
Which state of matter has particles with the most kinetic energy?
Solid
Liquid
Gas
3. Gas
Carbon has an atomic number of 6. How many protons, electrons, and neutrons are in a neutral carbon-13 atom?
Electrons-6
Neutrons-7
Aluminum has a density of 2.7 g/cm³. Which has a greater density: a small piece of pure aluminum foil or a large cooking pot made of pure aluminum?
They are the same density
A characteristic that can be observed or measured without changing the identity of the substance.
physical property
This is a testable statement or prediction that can be tested in a controlled experiment.
Hypothesis
A student makes salt water by mixing salt and water. What is the solution, solute, and solvent?
Solution- Salt water
Solute- Salt
Solvent- water
Argon has an atomic number of 18. How many protons are in a neutral argon-38 atom
18 protons
How many electrons does sodium have in each energy level?
2 in the first energy level, 8 in the second energy level, and 1 in the third energy level.
Atoms of the same element with the same number of protons but different numbers of neutrons.
Isotope