Chemistry
Scientific study of the properties and behavior of matter.
Chemistry
What are the three important things to keep us alive
Air, food, water
Motion and behavior through space and time, and the related entities of energy and force.
Physics
What is the fourth planet far from the sun
Mars
what is the only metal that is liquid at room temperatur
Mercury
When is photosynthesis take place
during day time
The name of changes from gas to solid
Deposition or desublimation
The area in which an organism lives is called
Habitat
Define oxidation in term of oxygen
Gain of oxygen
How long does it take a human embryo to develop in the uterus
9 months
How can pressure be calculated
Force divided by area
Starch is broken down into
Glucose
Define alloy and give one example
A metal made by imbibing two or more metallic elements, especially to give greater strength or resistance to corrosion. Your example can be brass, bronze, stainless steel, solder and more (I will check if your answer is apart from this)
What is the normal pulse rate of a boy while resting
80 bpm
The products of a combustion reaction are called
Oxides
A high frequency of vibrations produces
High pitch sound
What kind of metals are generally extracted by electrolysis
Alkali and alkali earth metal
What organ in a human allows nutrients to pass from the mother’s blood to the blood of an embryo
Placenta
Electricity is the build up of
Electrons
We can sometimes see some of the planets because
The reflecting light from the Sun