The process of obtaining information by using the senses is called a/an...
Observation
100
What is the pH of water?
7
200
A truck traveled 180 kilometers in 3 hours. What was the truck's average speed?
60 km/hr
200
Equal forces acting on one object in opposite directions are called...
Balanced forces
200
An astronomical unit is...
Earth's average distance from the sun.
200
A student is calculating the density of milk. What should the student use to find the milk's volume?
Graduated cylinder
200
A substance made of two or more elements chemically bonded together is a...
Compound
300
What are reference points used for?
To determine if an object is in motion.
300
The force of gravity exerted on a person or object at the surface of a planet is known as...
Weight
300
Which is the largest planet in the solar system?
Jupiter
300
In an experiment, the one variable that is changed is called the...
Independent variable or experimental variable
300
What is an ionic bond?
The chemical bond formed by a nonmetal and a metal. Involves the transferring of electrons.
400
A girl walked for 2 hours at an average speed of 4 km/hr. What was the total distance she walked?
8 km
400
What is the equation for Newton's 2nd Law?
F=ma
400
A light-year is a unit of ________
Distance
400
A scientist conducted an experiment to determine how the amount of salt in a body of water affects the number of plants that can live in the water. In this experiment the independent variable is...
The amount of salt in the water
400
Name the family in the periodic table that Lithium belongs to.
Alkali Metals
500
A baseball pitcher throws a pitch that curves over the plate at a speed of 100 km/hr. The velocity of the baseball changed because the baseball...
Changed direction during its motion.
500
Explain the action and reaction forces when you push against the ground with your foot in order to take a step forward.
A student is testing whether the angle of an inclined plane will affect how fast a toy car will roll down it. Which is the experimental (manipulated) variable in the experiment?
The angle of the inclined plane
500
Which pH value indicates the strongest acid? (Highest concentration of Hydrogen ions)