I have the breaking down of rock by weather, chemicals, roots etc.
Who has something you can see with your eyes?

I have an observation.
Who has the amount of matter in an object?

 I have the mass of an object.
Who has kinetic energy?

I have the energy of motion.
Who has potential energy?

I have stored energy.
Who has something that occurs when a ball is dropped?

I have potential energy changes to kinetic energy.
Who has the form of energy caused by the movement of electrons?

I have electrical energy.
Who has the form of energy stored in food, batteries and fossil fuels?

I have chemical energy.
Who has the form of energy in spinning wheels and gears?

I have mechanical energy.
Who has the six simple machines?

I have a wedge, pulley, wheel & axle, lever, screw, and inclined plane?
Who has a wedge?

I have an axe.
Who has a wheel and axle?

I have a doorknob.
Who has a lever?

I have a seesaw.
Who has an inclined plane.

I have a ladder.
Who has a screw?

I have a jar lid.
Who has a compound machine with a lever and wedge?

I have scissors.
Who has a compound machine with a lever and wheel and axle?

I have a wheelbarrow.
Who has a simple machine used to hoist a flag?

I have a pulley.
Who has the pivot point of a lever?

I have a fulcrum.
Who has something created by rubbing two objects together?

I have friction (and heat).
Who has inertia?

I have a principle that states that objects in motion tend to stay in motion and objects at rest remain at rest, unless acted on by a force.
Who has a working circuit?

I have a closed circuit.
Who has a non-working circuit?

I have an open circuit.
Who has a circuit with more than one pathway?

I have a parallel circuit.
Who has a circuit with only one pathway?

I have a series circuit.
Who has a material that is a poor conductor of electricity?

I have an insulator.
Who has electricity created by rubbing certain materials together?

I have static electricity.
Who has the male reproductive part of the flower?

I have a stamen.
Who has the part of a plant that takes water and nutrients from the soil?

I have a root.
Who has the part of the plant that makes food for the plant?

I have a leaf.
Who has an instrument that measures air pressure?

I have a barometer.
Who has an instrument that measures wind speed?

I have an anemometer.
Who has rocks formed by melting and cooling?

I have igneous rocks.
Who has rocks formed by layers of sediment over long periods of time?

I have sedimentary rocks.
Who has the reason we have seasons?

I have the tilt of the Earth.
Who has cause of day and night?

I have the rotation of the Earth.
Who has the part of the cell that is the control center of the cell?

I have the nucleus.
Who has the outer layer of animal cells?

I have the cell membrane.
Who has the kingdom to which bacteria belong?

I have monera.
Who has vascular plants?

I have trees and most flowering plants.
Who has something in plant but not animal cells?

I have a cell wall and chloroplasts.
Who has the storage sacks in a cell?

I have vacuoles.
Who has a puffy, dark cloud that brings thunderstorms?

I have a cumulonimbus cloud.
Who has a cloud that is high, thin and wispy?

I have a cirrus cloud.
Who has the border between two air masses, where changes of weather occur?

I have a front.
Who has an instrument that measures humidity?

I have a hygrometer.
Who has a fungus?

I have a mushroom.
Who has the process through which a gas changes to a liquid?

I have condensation.
Who has the last thing on the food chain?

I have a decomposer.
Who has the organism's role or place on the food chain?

I have a niche.
Who has what humans often destroy?

I have ecosystems.
Who has the jellylike substance in a cell?

I have cytoplasm.
Who has a nonvascular plant?

I have moss.
Who has what groundwater drains into from the surrounding area?

I have a watershed.
Who has the cause of earthquakes?

I have Earth's plates sliding against each other.
Who has erosion?

I have rock and soil carried away by wind and water.
Who has weathering?