unit 1
name and describe the sphere of our earth.
Lithosphere – earths solid outer layer
Hydrosphere – all of earths water in solid, liquid, and gas form
Biosphere – the zone around earth where life can exist
Atmosphere – the layer of gases surrounding the earth
What is the different between a pure substance and a mixture?
A pure substance is made up of one particle. A mixture is made up of a minimum of two particles
Name 3 good insulators
Oil, fur, silk, wool, rubber, glass, plastic, wood, paper, wax, ebonite, pure water
What are the 3 types of orbits that satellites can take? And explain each.
Low earth= these low earth orbit satellites revolve around earth at altitudes up to 2000km. medium earth = they orbit at altitudes up to 35000km. and geostationary= orbital path directly overtop of earths equator w a period equal to the period of earth’s rotation.
Astronauts loose up to 4% of their bone mass for each moth that they spend in microgravety conditions.
false
What is the difference between biotic and abiotic?
Biotic- living thing or the remains of a living thing
Abiotic- non-living physical and chemical component of the ecosystem
Name 3 physical properties of matter
Lustre, optical clarity, brittleness, viscosity, hardness, malleability, ductility, electrical conductively.
Does human skin have a high or low tendency to gain electrons
low
What are the 8 different parts of the structure of the sun?
Core, radiative zone, convective zone, solar prominence, solar flare, corona, chromosphere, and photosphere.
Rust is an example of an iconic compound.
true
What are some issues with pesticides?
The pesticides never actually just reach the targeted species because it is carried by air or lands in the soil. It can cause harm to other non-targeted species.
Name the chemical families
Alkali metals, transition metals, halogens, rare earth metals, alkaline earth metals, noble gases
How do you calculate efficentcy?
E out divided by E in muliplied by 100
What makes a dwarf planet different from the other planets?
It doesn’t dominate its orbit
In the Bohr- Rutherford diagram there are protons and neutrons inside the nucleus.
true
Define photosynthesis
The process in which the suns energy is converted into chemical energy
Name two physical properties of a non metal
Dull, powdery, solid
What unit is used to measure elctrical power
Watts
What does a star's mass determine?
Color, size, brightness, and how long it will ‘live’
J.J. Thompson is the father of the periodic table
false
What are the 5 terrestrial regions that are biome?
Mountain forest, tundra, boreal forest, temperate deciduous forest, and grasslands.
How can you physically identify hydrogen gas mixed with oxygen atoms?
A popping sound
What is the difference between a parallel circuit and a series circuit?
Parallel is when there are multiple paths for electrons to flow, and series is when there is only one available path for electrons to flow through in a circuit.
What does the Hertzsprung- Russel (H-R diagram) do?
It plots the absolute magnate against the star surface temperature.
The most dramatic water pollution events are oil spills
true