4th Grade Science Flashcards: Compare Speed And Energy

What this deck covers

This deck focuses on Compare Speed And Energy, giving you a quick way to review the definitions, rules, and examples that matter most for 4th Grade Science.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: Which has more kinetic energy if two objects move at the same speed but have different masses?

Answer: The object with greater mass has more kinetic energy. Mass increases kinetic energy when speed stays constant.

Flashcard 2: Which object is faster if A travels $18\ \text{m}$ in $3\ \text{s}$ and B travels $25\ \text{m}$ in $5\ \text{s}$?

Answer: A is faster. A: $18 \div 3 = 6\ \text{m/s}$; B: $25 \div 5 = 5\ \text{m/s}$.

Flashcard 3: Which statement is best supported: same mass, speeds $2\ \text{m/s}$ and $4\ \text{m/s}$; which has more kinetic energy?

Answer: The object at $4\ \text{m/s}$ has more kinetic energy. Same mass, but $4\ \text{m/s}$ is twice as fast as $2\ \text{m/s}$.

Flashcard 4: Which has more kinetic energy: A is $3\ \text{kg}$ at $4\ \text{m/s}$, B is $1\ \text{kg}$ at $4\ \text{m/s}$?

Answer: A has more kinetic energy. Same speed, but A has $3\ \text{kg}$ vs B's $1\ \text{kg}$.

Flashcard 5: Which has more kinetic energy: a $4\ \text{kg}$ cart at $2\ \text{m/s}$ or a $2\ \text{kg}$ cart at $2\ \text{m/s}$?

Answer: The $4\ \text{kg}$ cart at $2\ \text{m/s}$. Same speed, but $4\ \text{kg}$ has more mass than $2\ \text{kg}$.

Flashcard 6: Which object is faster: A travels $15\ \text{m}$ in $3\ \text{s}$ or B travels $15\ \text{m}$ in $5\ \text{s}$?

Answer: A is faster. A takes $3\ \text{s}$ vs B's $5\ \text{s}$ for same distance.

Flashcard 7: Which object is faster: A travels $30\ \text{m}$ in $6\ \text{s}$ or B travels $24\ \text{m}$ in $6\ \text{s}$?

Answer: A is faster. A travels $30\ \text{m}$ vs B's $24\ \text{m}$ in same time.

Flashcard 8: Which option shows the correct speed for $20\ \text{m}$ traveled in $5\ \text{s}$?

Answer: $4\ \text{m/s}$. $20 \div 5 = 4$, so speed equals $4\ \text{m/s}$.

Flashcard 9: Which option shows the correct speed for $12\ \text{m}$ traveled in $3\ \text{s}$?

Answer: $4\ \text{m/s}$. $12 \div 3 = 4$, so speed equals $4\ \text{m/s}$.

Flashcard 10: What tool is typically used to measure time when comparing speeds in an experiment?

Answer: Stopwatch or timer. Essential tool for measuring elapsed time in speed experiments.

Flashcard 11: What evidence can you use to compare speeds in a fair test?

Answer: Same distance and measured time (or same time and distance). Control one variable while measuring the other for fair comparison.

Flashcard 12: Which has more kinetic energy if two objects have the same mass but different speeds?

Answer: The faster object has more kinetic energy. Speed increases kinetic energy when mass stays constant.

Flashcard 13: Which object is faster if both travel the same distance but one takes less time?

Answer: The object that takes less time is faster. Same distance in less time means higher speed.

Flashcard 14: What is speed in science, written as a formula using distance and time?

Answer: Speed $=$ distance $\div$ time. Speed measures how fast something moves by comparing distance to time.

Flashcard 15: What does it mean if an object has a greater speed than another object?

Answer: It covers more distance per unit time. Higher speed means traveling more meters each second.

Flashcard 16: What units are commonly used for speed when distance is meters and time is seconds?

Answer: Meters per second $(\text{m/s})$. Standard SI unit when measuring distance in meters and time in seconds.

Flashcard 17: Which object is faster if both move for the same time but one travels farther?

Answer: The object that travels farther is faster. Greater distance in same time means higher speed.

Flashcard 18: What is kinetic energy in a single, grade-appropriate definition?

Answer: Energy of motion. The energy an object has because it's moving.

Flashcard 19: Choose the best evidence that an object has more kinetic energy: faster motion, brighter color, or colder temperature.

Answer: Faster motion. Speed directly indicates kinetic energy level.

Flashcard 20: Which moving object has more kinetic energy if their speeds are equal: the larger mass or the smaller mass?

Answer: The larger mass has more kinetic energy. More mass means more kinetic energy at same speed.

Flashcard 21: Which moving object has more kinetic energy if their masses are equal: the faster one or the slower one?

Answer: The faster one has more kinetic energy. Higher speed means more kinetic energy.

Flashcard 22: What is kinetic energy (definition) for moving objects?

Answer: Kinetic energy is the energy an object has because it is moving. Motion gives objects this type of energy.

Flashcard 23: Identify the faster object: A speed is $4\text{ m/s}$; B speed is $3\text{ m/s}$.

Answer: Object A. Direct comparison: $4\text{ m/s} > 3\text{ m/s}$.

Flashcard 24: Identify the faster object: A goes $12\text{ m}$ in $3\text{ s}$; B goes $10\text{ m}$ in $2\text{ s}$.

Answer: Object B. B: $5\text{ m/s}$ vs A: $4\text{ m/s}$.

Flashcard 25: Which object has greater speed if both travel the same distance: the one with less time or more time?

Answer: The one with less time has greater speed. Same distance in less time means faster speed.

Flashcard 26: Which object has greater speed if both move for the same time: the one with greater distance or less distance?

Answer: The one with greater distance has greater speed. More distance in same time means faster speed.

Flashcard 27: What tool is commonly used to measure distance when finding speed in a classroom investigation?

Answer: A meter stick or measuring tape. Measures length traveled for speed calculations.

Flashcard 28: What tool is commonly used to measure time when finding speed in a classroom investigation?

Answer: A stopwatch (or timer). Measures elapsed time for speed calculations.

Flashcard 29: Which unit is most appropriate for a runner’s speed: $\text{m/s}$ or $\text{m}^2$?

Answer: $\text{m/s}$. Meters per second measures speed; $\text{m}^2$ is area.

Flashcard 30: What is the formula for speed using distance and time?

Answer: $\text{speed}=\frac{\text{distance}}{\text{time}}$. Distance traveled divided by time taken.