genetics
how many pair of genes in humans
each cell normally contains 23 pairs of chromosomes, for a total of 46
what type of plant that are in the dessert and are spiky
cactus
Do waves need matter?(not a yes or no question)
Classical waves transfer energy without transporting matter through the medium.
What is energy
the ability to do work.
What can a force change?
Why do children have characteristics of both parents?
Parents pass on traits or characteristics, such as eye colour and blood type, to their children through their genes. one characteristic has many different forms.
Plants need three main ingredients to make their food?
water, carbon dioxide and sunlight
What is the difference between a transverse and a longitudinal wave?
Longitudinal waves cause the medium to move parallel to the direction of the wave.
What is energy measured in?
Joules
What quantities can force change?
shape and volume
why do children have identical characteristics from ur family?
Children look like combinations of their parents because they are. Each parent gives half of their genetic material to their children. Properties or traits are passed from parents to children and so on.
Why are plants green?
because it does not absorb the green wavelengths of white light.
What is frequency of a wave?
how often the particles of the medium vibrate when a wave passes through the medium.
How does energy move?
by conduction within solids, by the flow of liquid or gas (convection), and by radiation, which can travel across space.
What unit is force measured in?
newton
Explain why their eye colour is identical but their weight and skin colour are not identical.
Using DNA Differently
why cant plants photosynthesis at night?
due to absence of sunlight, photosynthesis stops.
Should waves have energy?
What is the largest source of energy?
Fossil fuels
What are balanced forces?
forces that are equal in size and opposite in direction.
Describe how genetic information is passed on from a parent to a child.
One copy is inherited from their mother (via the egg) and the other from their father (via the sperm).
what do plants eat
glucose and starch or multicellular organisms which make their own food.
What if there were no waves?
No heat, no light, no sound. Not even any movement. Not a single thing.
What energy is not stored?
Kinetic energy
Do forces affect motion?
Forces can set an object that is standing still into motion.