Density
Density is what kind of property of matter?
Physical
The symbol of an element on periodic table starts with what?
A capital letter
Which activity involves only a physical change?
A. Grinding coffee beans
B. Baking a cake
C. Burning paper
D. Fireworks exploding
A. Grinding coffee beans
A student wrote: I placed a toy car in a beaker of water and the car sunk to the bottom. What is this an example of?
A. PredictionB. Hypothesis
C. Inference
D. Observation
D. Observation
A. Chemical compounds
B. Atoms
C. Cells
D. Mixtures
B. Atoms
As pressure increases, what will happen to density?
Density will increase.
What are the horizontal rows on the periodic table called?
A. Groups
B. Sections
C. Periods
D. Has no name
C. Periods
Which is an example of a chemical change?
A. Ripping a piece of paper
B. Sawing wood in half
C. A nail rusting
D. Water boiling
C. A nail rusting
What is the final step of the scientific method?
A. Finding the problem
B. Completing an experiment
C. Drawing conclusions
D. Forming a hypothesis
C. Drawing conclusions
Which subatomic particle has a neutral charge?
A. Proton
B. Neutron
C. Electron
D. None of the above
B. Neutron
Which is the density of an object with a volume of 5 cubic centimeters and a mass of 30 grams?
6 g/cm3
What are the vertical columns on the periodic table called?
A. Categories
B. Sections
C. Groups
D. There is no name.
C. Groups
When a teaspoon of sugar is added to water, the sugar dissolves. What is the resulting mixture?
A. A solution
B. A compound
C. An element
D. A cell
A. A solution
In an experiment, a factor that changes is called?
A. Conclusion
B. Variable
C. Atom
D. Control
B. Variable
Which pH value indicates the strongest base?
A. 10
B. 2
C. 9
D. 7
A. 10
3 blocks are in a container with water. Block A is on top of the water.
Block B is close to the bottom of the container.
Block C is slightly in the water. Which block has the greatest density?
Block B
What determines the order of placement of the elements on the Periodic Table?
A. Atomic Number
B. Atomic Mass
C. Number of neutrons
D. Number of electrons
A. Atomic number
The gravitational force between two objects is most impacted by what?
A. Atoms and volume
B. Motion and distance apart
C. Mass and distance apart
D. Friction and volume
C. Mass and distance apart
Which substances cannot be decomposed (broken down) into other substances?
A. A solution
B. A compound
C. Chemicals
D. Elements
D. Elements
A bus travels a distance of 40 meters in 20 seconds. What is the average speed of the bus?
2.0 m/s
Object A has a density of 1.5 g/cm3
Object B has a density of 0.6 g/ cm3
What will happen when the objects are placed in a container of water (water: 4o C)?
Object B will float and object A will sink.
1. How many different elements are there in this chemical compound?
BaCO
2. What does C stand for?
1. 3
2. Carbon
A teacher added some sugar to their coffee but it did not dissolve quickly. What could the teacher do to make the sugar dissolve faster?
Heat up the coffee
A person weighing 445 newtons is standing on a skateboard. In order to support the man, the skateboard is exerting a force of how many newtons?
445 Newtons (N)
1. What is friction?
2. What is an example?
1. When two objects rub against each other.
2. Example ?