Question

Which form of energy does a plant store when light is transformed during photosynthesis? chemical energy thermal energy mechanical energy electrical energy Grade 9Matter The SI unit of pressure is the . pascal atmosphere torr bar Grade 9Forces and Motion Friction within machinery increases efficiency. True False Grade 9Matter Water above the temperature at which molecules are able to break away from each other and form a gas would be known as . water ice steam plasma Grade 9Matter A has no definite shape or size. solid liquid gas plasma Grade 9Forces and Motion Newton's Third Law gets help from the first two laws. Which aspects of those laws are necessary to help explain Newton's Third Law of Motion? Select all answers that apply. An object in motion tends to stay in motion An object at rest tends to stay at rest Force equals mass times acceleration The greater the mass is, the greater the force necessary to accelerate that mass is The acceleration of an object is parallel and directly proportional to the force created For every action, there is an equal and opposite reaction Apples hurt when they land on your head Grade 9Forces and Motion Gravity will apply a different amount of force to objects with different mass. The force of gravity can also be called weight. inertia. kilograms. resistance. mass Grade 9Forces and Motion Distance traveled per unit of time is . velocity speed motion acceleration Grade 9Heat Transfer The transfer of energy (heat) through space by means of electromagnetic waves is conduction. convection. radiation. Grade 9Forces and Motion The distance and direction of an object's change in position from a reference point is . motion acceleration displacement velocity Grade 9Energy and Momentum Energy stored in the bonds between atoms is called kinetic energy. mechanical energy. chemical energy. thermal energy. Grade 9Magnetism and Electricity Look at the drawing. If each resistor is 2 Ohms, what is the total resistance of the circuit? Series Circuit 3 Ohms 0 Ohms 1 Ohm 6 Ohms Grade 9Waves and Sound Waves not only move up and down, but also move forwards. backwards. none of the above. a and b. Grade 9Forces and Motion An object will move if the forces acting on it are . negative unbalanced balanced positive Grade 9Forces and Motion An astronaut drops a hammer and an egg while standing on the surface of the Moon. Which one will hit the surface first? the egg the hammer both will land at the same time neither, both will float off into space Grade 9Forces and Motion Newton's First Law is also known as The Law of Velocity. The Law of Gravity. The Law of Inertia. The Law of Conservation. The Law of the Land. Grade 9Waves and Sound A sound wave is an example of a transverse wave. longitudinal wave. primary wave. secondary wave. ocean wave. Grade 9Quantum Physics and the Atom If an atom has a mass number of 14 and an atomic number of 9, then how many neutrons does the atom have in its nucleus? 3 7 5 6 Grade 9Simple Machines When using a broom to sweep a floor, your mechanical advantage will be less than 1 and your fulcrum will be your hand at the top of the broom. This means the broom acts as which type of lever? Class 1 Lever Class 2 Lever Class 3 Lever Class 4 Lever Grade 9Matter A has a definite size, but not a definite shape. solid liquid gas plasma ans it fast

Answer 1

Answer:

• A pure element or compound contains only one substance, with no other substances mixed in. Impure materials may be mixtures of elements, mixtures of compounds, or mixtures of elements and compounds....................................................

Answer 2

Chemical Energy

Photosynthesis is the process by which organisms that contain the pigment chlorophyll convert light energy into chemical energy which can be stored in the molecular bonds of organic molecules (e.g., sugars).