Earth
What are the four layers of the Earth?
crust, mantle, outer core, inner core.
What are the three main particles in an atom?
Protons, neutrons, and electrons.
What do we call all the living things in an area?
A community.
What is the flow of electric charge called?
Electric current
What is a constructive plate boundary? What is a destructive plate boundary
Constructive Plate Boundaries is when two plates move apart from each other causing magma to rise and create new crust, Destructive plate boundaries is when two plates collide together to form mountains or subduction.
What is an isotope?
Atoms of the same element with the same number of protons but different numbers of neutrons.
give an example of abiotic and biotic factors.
Abiotic: Sunlight, temperature, water, soil.
Biotic: Plants, animals, bacteria, fungi (any living thing)
What type of mirror makes things look bigger?
Concave mirror (when object is close to it)
3 factors that can influence the destruction of an earthquake
What particle is released in beta decay?
An Electron
What happens to a predator population if prey numbers decrease?
The predator population also decreases due to lack of food.
Why does a concave mirror form a real image when the object is far away?
Light rays reflect and converge at a point in front of the mirror.
What is the process of subduction?
1.Plate collision
2.Sinking of the denser plate
3.Formation of a trench
4.Melting of denser plate
5.Volcanic activity
6.Earthquakes
Write the nuclear equation for alpha decay of Uranium-238
²³⁸₉₂U → ⁴₂He+²³⁴₉₀Th
Describe one factor that can cause a population to increase.
More food, fewer predators, more shelter, higher birth rate, reduced disease
In a series circuit, what happens to the brightness of bulbs if more bulbs are added?
They become dimmer because the voltage is shared.
What is the Theory of tectonic Plate?
Plate tectonics is the scientific theory that Earth’s outer crust is divided into large, moving plates that float on the semi-molten magma and soft mantle below causing convection currents which triggers earthquakes, volcanoes, mountains, and new ocean/continental crust.
During beta decay, why does the atomic number increase by 1?
A neutron changes into a proton and an electron; the electron leaves the nucleus, so there is one extra proton.
Explain how removing a top predator can affect an entire ecosystem.
Removing a top predator can cause prey populations to increase, which may lead to overgrazing or depletion of plants, which then affects other species and can collapse the food web.
A circuit has 9 V voltage and 3 A current. What is the resistance, and what happens to current if resistance doubles?
Resistance = 3 Ω (R = V ÷ I)
If resistance doubles (to 6 Ω), the current halves to 1.5 A.