Vocabulary/Seasons
The invisible pole that goes through the center of the Earth
Axis
What is the tilt of Earth on its axis?
23.5 degrees
What is the MAIN purpose of photosynthesis?
To transfer RADIANT (light/solar/sun) energy to CHEMICAL (glucose/food) energy
What happens to matter when substances are mixed?
Matter is conserved
What are the 3 subparticle in an atom?
Proton
Electrons
Neutrons
The Earth ______ around the sun.
Revolves/ Orbits
What season matches this description:
"Shorter days and longer nights"
Winter
Name the reactants and products for Photosynthesis
Reactants: Light energy, CO2, H2O
Products: Oxygen is released, Glucose is formed
When two substances are mixed, does the total amount of matter increase, decrease, or stay the same?
Stays the same
When two or more atoms held together by a chemical bond is referred to as a:
Molecule
Shortest days/ longer nights is___A_____
Longer days/ Shorter nights is ___B______
A.Winter (Solstice)
B.Summer (Solstice)
If the Earth is pointed towards the Sun what type of rays are hitting the Earth?
Direct Rays
While at summer camp, Susan noticed a triangle pattern of bright stars straight up in the sky every night. One day in late fall Susan looked for the triangle of stars in the sky but she could not find it.
What is themost likely reason that she couldn't find the same pattern of stars?
Different constellations can be seen during DIFFERENT SEASONS.
A scientist mixes 15 g of sugar with 40 g of water. What is the new total weight?
55 grams
What is H2O an example of and explain why.
Water Molecule- Its a molecule because it has two atoms bonded together.
A time when the sun is directly above the equator, and the length of day and night are nearly equal
Equinox (Spring and Fall)
When it is winter, the United States receives the least direct solar energy as compared with the rest of the year. Why does this happen?
The Earth is tilted towards the sun in summer and away from the sun in winter. So it receives less direct sunlight and less hours of daylight.
Orion can be seen from most places in the world at some point during the year. Orion is not seen from the same place all year long because
A. The Earth rotates, making Orion visible during the day from some places and during the night from others.
B. Orion orbits the Sun, changing its position relative to the Earth.
C.the Earth orbits the Sun, changing the night view from Earth.
D.Orion orbits the Earth like the Moon does.
C.
Why is dissolved matter still considered matter?
It still has mass and takes up space
Carbon dioxide is made of one carbon atom and two oxygen atoms. How many atoms are in one molecule of carbon dioxide?
3 atoms
An imaginary line drawn around the earth that is equally distant from both poles. It divides the Earth into northern and southern hemispheres.
Equator
Describe how the tilt of the Earth contributes to Earth's seasons happning?
The tilt of the Earth causes the hemispheres to face or not face the sun, this is what causes the seasons.
*Or something like this*
The earth experiences four seasons: winter, spring, summer, and fall. What are the 2 most important factors causing season changes?
The earth's position in orbit around the sun and tilt (tilt never changes as it orbits)
A student mixes 50 grams of salt with 200 grams of water in a beaker. After stirring, the salt completely dissolves. The student weighs the solution and finds the total mass is 250 grams.
What does this experiment show?
A. The beaker becomes heavier when the salt dissolves.
B. The mass of the water changes when the salt dissolves.
C. The salt disappears when mixed with water, reducing the total mass.
D. The total mass of matter stays the same when substances are mixed.
D
Give one example you heard in class of an:
Atom
Molecule
Compound
Atom-Oxygen
Molecule- H2O, O2
Compound- Can be any thing such as H2O as long as it shows two or more DIFFERENT elements bonded together.