Physics
What are the 3 states of matter?
Solid, liquid, gas
A _______ solution is one in which no more solute will dissolve at that temperature.
saturated
1. What is the smallest living unit of living things?
A. a brain
B. a nucleus
C. a cell
D. a protein
C. a cell
A subatomic particle that carries a positive electric charge is called a(n) ______.
proton
Organisms take in carbon dioxide and release oxygen, during the process of _______________.
photosynthesis.
Which state of matter has a definite shape and volume?
Solid
The solubility of most solid solute increases as the __________ increases.
temperature
What is the function of vacuole in cells?
Store water and mineral
An elephant weighs 7000N and its feet have a surface area of 2 m2. How much pressure is exerted?
3500 Pa
What is my favourite word in science?
characteristics
What are the two types of circuits?
Series; Parallel
The solubility of gases increases as the temperature ________.
decreases
Cytoplasm of the cell is a watery, ______-like substance?
jelly
A neutral object becomes positively charged when it loses electrons.
A. True
B. False
A
What exists on the boundary between living and non-living things?
Virus
Condensation is a change of state from ______ to ______.
gas;liquid
What is essential for a combustion reaction to begin？
fuel, oxygen and heat
What are the 2 special organelles that only plant cells have?
What is the source of almost all energy on Earth?
Sun
Reduction is the ___________ of electrons.
gain
What is pressure?
The amount of force exerted on a surface
When will carbon monoxide be produced during combustion?
When incomplete combustion happen.
Give 4 examples of precipitation.
Snow, sleet, hail, and rain
Organisms take in oxygen and release carbon dioxide, during the process of _______________.
Respiration
Give 5 examples of combustion.
cooking
wild fire
light up matches, candles
car using fuels
human digestion
etc.