It's All Elemental
This property describes an element's ability to be hammered, rolled, or shaped into thin sheets without breaking.
What is malleability?
An object with a density of 1.2 g/cm3 is placed into pure water (1.0 g/cm3). State whether it will sink or float.
What is sink?
This solid forms and settles out of a solution when two liquid chemicals are combined.
What is a precipitate?
The contact force that acts along with the sliding surface to oppose relative motion.
What is friction?
Condition where all forces acting on an object cancel each other out completely, resulting in a net force of 0 N.
What are balanced forces?
Complete Newton's 3rd Law: "For every action force, there is an equal and..."
What is opposite reaction?
These elements are usually dull, brittle when solid, and poor conductors.
What are nonmetals?
Object X floats in water (1.0 g/mL) but sinks in vegetable oil (0.92 g/mL). Compare the density of Object X relative to water and oil.
What is less dense than water, but more dense than vegetable oil?
Observing fizzing or bubbling without applying outside heat is direct evidence of this chemical change.
What is production of a gas?
The upward support force exerted by a stable surface ( like a table) acting on an object resting on it.
What is the normal force?
Student A pushes a box right with 10 N. Student B pushes the same box right with 15 N. Calculate the net force.
What is 25 N to the right?
If an action force pushes an object directly North, the simultaneous reaction force pushes in this direction.
What is South?
Located on the left side and center of the periodic table, these elements are typically shiny, malleable, ductile, and good conductors.
What are metals?
A helium balloon rises into the air. Explain why using relative density.
What is helium gas is less dense than the surrounding air?
What is boiling water only changes state, whereas acid reacting with zinc creates a new substance?
Name the TWO opposing vertical forces acting on a textbook sitting completely still on top of a classroom desk.
What are gravity (pulling down) and normal force (pushing up)?
In tug-of-war, Team Left pulls with 50 N and Team Right pulls with 30 N. Calculate the net force and direction.
What is 20 N to the left?
When jumping forward off a small, unanchored canoe, the canoe moves backward. Identify the action and reaction force pair.
What is action: foot pushes canoe backward; reaction: canoe pushes foot forward?
An unknown element is solid and shiny at room temperature, but shatters when struck with a hammer and conducts electricity decently. Classify this element.
What is a metalloid?
In deep ocean currents, cold water sinks beneath warm water. Explain this phenomenon using the concept of density.
What is cold water is more dense than warm water?
Scenario B: Heating sugar until it turns into black ash and smokes.
State which is a chemical change and list two pieces of evidence.
What is Scenario B, evidenced by unexpected color change and gas/smoke production?
A skydiver falls through the air at a steady speed with an open parachute. Name the contact force opposing gravity.
What is air resistance (or friction)?
A travels down a straight highway at a steady speed of 65 mph. Determine whether the forces acting on the car are balanced or unbalanced.
What are balanced forces (net force is 0 N because velocity is constant)?
Describe the simultaneous force pair between your foot and the floor when walking forward.
What is your foot pushes backward on the floor, and the floor pushes forward on your foot?
This specific metalloid is vital to modern life because it is used as a semiconductor in computer microchips, cell phones, and solar panels.
What is silicon?
A column contains Liquid A (0.8 g/mL) stacked on top of Liquid B (1.1 g/mL). Describe the final resting positions of Block 1 (0.7 g/mL), Block 2 (0.95 g/mL), and Block 3 (1.3 g/mL).
What is Block 1 floats on top of Liquid A; Block 2 floats between Liquid A and B; Block 3 sinks to the bottom of Liquid B?
An investigator mixes two clear liquids. The flask becomes hot to the touch, turns bright yellow, and forms a cloudy solid particles that settle. Identify ALL three pieces of evidence present.
What are change in temperature, color change, and formation of a precipitate?
Categorize these 5 forces into Contact vs. Noncontact Forces:
Gravity, Friction, Magnetism, Applied Force, Normal Force
What are Contact Forces: Friction, Applied Force, Normal Force; and Non-Contact Forces: Gravity, Magnetism?
A diagram shows an object with forces: 20 N up, 20 N down, 18 N left, and 6 N right. Calculate the overall net force and describe the motion change.
What is 12 N to the left, causing the object to accelerate to the left?
A heavy bowling ball strikes a light plastic pin.
True or False: The bowling ball hits the pin with more force than the pin hits the bowling ball. Explain using Newton's 3rd Law.
What is False (forces are equal in magnitude and opposite in direction regardless of mass)?