The big bang occurred
about_____billion year ago.
A) 15
B) 05
C) 8
D) 20
Explanation: Universe is all the matter and energy that exists or ever existed in our knowledge. The study of the universe is called cosmology. The scientists who study cosmology are called cosmologists.
The speed of sound in iron or steel (at 20o C) is ________
A) 322 m/s
B) 3962 m/s
C) 1570 m/s
D) 5130 m/s
The primary color of
light are_______
A) Red, Green, Orange
B) Green, Blue, Orang
C) Red, Blue, Green
D) Yellow, Red, Green
Explanation: The three primary colors of light are red, blue,
and green.
Mixing the Primary Colors of
Light
When you mix the primary
colors of light they give you secondary colors.
Primary Color + Primary
Color = Secondary Color
Red + Blue = Magenta
Red + Green = Yellow
Green + Blue = Cyan
All primary colors mix to form white light:
Red + Blue + Green = White
The propose of ______ is to increase the like hood that children will engage in appropriate behavior.
A) Money
B) Education
C) Positive feedback
D) Correction
For teaching science, which method is more effective?
A) Lecture method
B) Discussion method
C) Project method
D) Demonstration
