Module 1
What is physical science the study of?
nonliving things
True or false
Homogeneous and heterogeneous are pure substances
False!
Where is all the mass of a atom found?
In the nucleus. protons plus neutrons
True or false
When balancing an equation you should always change the coefficients in a chemical formula.
True
An investigation in which the factors that influence the outcome are kept the same except for one.
Controlled experiment
The gathering of information using senses or with the aid of instruments.
Observations
A characteristic that can be observed or measured without changing the identity of the substance.
Physical property
True or False
Elements in the same group (column) of the periodic table have similar properties.
True
Which compounds are the reactants in the following chemical equation?
2Na + 2H₂O → 2NaOH + H₂
2Na and 2H2O
Anything that has mass and takes up space.
Matter
This is a testable statement or prediction that can be tested in a controlled experiment.
A Hypothesis
A characteristic that can only be observed when a substance undergoes a chemical change and forms a new substance.
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
A bond formed between two atoms sharing electrons
Covalent bond
For an electron to move to a higher energy level, it must absorb energy/lose energy.
Absorb energy
What type of observation is made when I say the ball is red?
Qualitative observation
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
Carbon has an atomic number of 6. How many protons, electrons, and neutrons are in carbon-13?
Protons-6
electrons-6
neutrons-7
Is this equation balanced, yes or no?
Na + Cl₂ → 2 NaCl
NO
What bond is the weakest?
Ionic bond
Covalent bond
Hydrogen bond
Hydrogen bond
What type of observation is made when I say the ball is 2in tall?
Quantitative observation
A student makes salt water by mixing salt and water. What is the solution, solute, and solvent?
Solution- Salt water
Solute- Salt
Solvent- water
What is the same and what is different between two isotopes of the same element?
Same: number of protons
Different: number of neutrons/ mass number
Balance the following equation
_ Al + _ O₂ → _ Al₂O₃
4 Al + 3 O₂ → 2 Al₂O₃
What science topic did you enjoy learning about the most this quarter?
Any answer as long as it is science is correct