Chemistry
Which of the following is an example of a chemical change?
A. Ice melting into water
B. Paper being cut into smaller pieces
C. Iron rusting in the presence of water
D. Water boiling into steam
C
Name and describe Newton's 1st law.
Law of Inertia: an object at rest will stay at rest, and an object in motion will stay in motion at a constant velocity, unless acted on by an unbalanced external force.
Question: Which type of plate boundary occurs when two plates move away from each other?
Divergent boundary
Question:
Which of the following statements best explains how the HR diagram classifies stars?
A. Stars are arranged by size and distance from Earth, with closer stars appearing at the top.
B. Stars are grouped by age and color, with older stars being red and located on the left.
C. Stars are plotted by luminosity and temperature, with main sequence stars forming a diagonal band.
D. Stars are ranked by mass and chemical composition, with more massive stars always found in the center.
C. Stars are plotted by luminosity and temperature, with main sequence stars forming a diagonal band.
Name 3 organelles found in plant cells but not in animal cells?
Cell Walls, Central Vacuoles, Chloroplast.
How many elements are in the chemical equation 3 Fe₂(SO₄)₃ + 2 Al → 2 Al₂(SO₄)₃ + 3 Fe?
4 elements: Iron (Fe), Sulfur (S), Oxygen (O), Aluminum (Al)
Which energy transformation occurs in a wind turbine?
A. Electrical energy → Mechanical energy
B. Chemical energy → Thermal energy
C. Mechanical energy → Electrical energy
D. Nuclear energy → Electrical energy
C. Mechanical energy → Electrical energy
What causes the ocean tides on Earth?
A. Winds blowing across the ocean
B. Earth's rotation only
C. The Moon’s gravity pulling on Earth’s oceans
D. Earth getting closer to the Sun during the day
C. The Moon’s gravity pulling on Earth’s oceans
Where would the hottest and brightest stars be located on the HR diagram?
Top left
Birds flying south for the winter is an example of what?
A behavioral adaptation?
If a chemical combustion reaction starts with 30g of reactants, how much product will form? Why?
30g, because of the Law of Conservation of Mass
A 2kg object accelerates at 3 m/s². What is the force?
(F = 2 × 3 = 6 N)
Which of the following best supports the theory that continents were once connected?
A. The differences in climate between modern continents
B. The presence of similar mountain ranges on opposite coasts of oceans
C. Similar fossils, matching rock layers, and the puzzle-like fit of continents
D. The current direction of ocean currents and wind patterns
C. Similar fossils, matching rock layers, and the puzzle-like fit of continents
Name 3 galaxy types.
Spiral Galaxies, Elliptical Galaxies, Irregular Galaxies
A tiger cub has a pattern of stripes similar to it's those of it's parents. Where are the instructions stored that provide information for a tiger's fur pattern?
On genes within chromosomes. (found within the nucleus of cells)
How many atoms are in Al₂(SO₄)₃?
(17: 2 Al, 3 S, 12 O)
Why does a balloon fly across the room when the air is released? (Name and describe the Law)
(Newton’s Third Law – action and reaction)
Describe how convection currents in the atmosphere work and how they affect weather patterns?
Convection currents cause warm air to rise and cool air to sink, creating wind patterns and affecting weather systems like storms, rainfall, and temperature changes.
Describe the location of our sun in the milky way galaxy. Include type of galaxy and where in the galaxy.
The sun is located on the Orion arm located about half way between the center and the edge of the spiral galaxy.
Which 2 body systems are primarily responsible for locomotion?
Skeletal and Muscular.
How many atoms in 3 Fe₂(SO₃)₃?
(3 × (2 Fe + 3 S + 9 O) = 6 Fe, 9 S, 27 O → 42 atoms)
A student pushes a box with a force of 50 N. The box has a mass of 10 kg. What is its acceleration?
(a = F/m = 50/10 = 5 m/s²)
Why does Texas experience more hurricanes in the summer months? Be specific and describe how energy plays a role in this phenomena.
Warm ocean waters provide the energy needed to fuel hurricanes, and during summer, sea surface temperatures are higher, making it easier for storms to develop and intensify.
Question: What is the relationship between the Moon's phases and the tides on Earth?
A. The phases of the Moon have no impact on tides.
B. The phases of the Moon determine the direction of the wind and rainfall.
C. The gravitational pull of the Moon and the Sun affects the tides, with the phase of the Moon determining the tidal range.
D. The phases of the Moon control the Earth's rotation speed, which in turn affects tides.
C. The gravitational pull of the Moon and the Sun affects the tides, with the phase of the Moon determining the tidal range.
Grassland ecosystems in Texas have evolved to depend on periodic fires to return nutrients to the soil and encourage plant reproduction. Humans have prevented fires in many of these grassland areas, resulting in plant and animal communities with very little diversity. Wildlife biologists often recommend purposefully starting fires called prescribed burns, which are monitored and controlled, in grassland ecosystems every 3 to 4 years. These biologists observe greater diversity in plant and animal life in the years following a prescribed burn.
What natural process are the biologists attempting to imitate? (be specific)
Secondary Succession