Health and lifenstyle
Name one benefit of regular exercise.
Improves cardiovascular health / strengthens muscles / boosts mood.
What is a chemical reaction?
A process where substances change to form new substances.
What do we call a sound that is too loud and can damage our ears?
Noise polution
What is reflection?
When light bounces off a surface.
What is a circuit?
A closed loop that allows electricity to flow.
What nutrient is important for muscle growth?
Protien
What gas is produced when vinegar reacts with baking soda?
Carbon dioxide.
What medium does sound travel fastest through: solid, liquid, or gas?
Solid
What happens when light passes through a prism?
It splits into a spectrum of colors.
Name two components in a simple circuit.
Battery and bulb (or wire, switch)
What is the difference between a balanced and unbalanced diet
A balanced diet includes all food groups in the right amounts; an unbalanced diet lacks some nutrients or has too much of one type.
What does a catalyst do in a reaction?
Speeds up the reaction without being used up
What part of the ear helps with balance and hearing?
The inner ear
Name all the colors in a rainbow
Red orange yellow green blue indigo violet
What is the function of a resistor?
It limits the flow of electric current.
What is the difference between a balanced and unbalanced diet?
A balanced diet includes all food groups in the right amounts; an unbalanced diet lacks some nutrients or has too much of one type.
Describe an example of an exothermic reaction.
Burning wood releases heat
How do we measure the pitch of a sound?
By its frequency in hertz
How does a lens help people with poor eyesight?
It bends light to focus images correctly on the retina.
What is the difference between series and parallel circuits?
Series: one path for current; Parallel: multiple paths.
Explain how smoking affects the lungs and circulatory system.
Smoking damages lung tissue and reduces oxygen intake; it also narrows blood vessels, increasing heart disease risk.
Explain the difference between a physical and chemical change.
Physical change alters appearance, not composition; chemical change creates a new substance.
Explain the entjre process of how sound gets to our brain
Your ossicles send the vibrations to your cochlea (a spiral cavity in your inner ear that's lined with hair cells). The tiny hair cells vibrate and send messages to your auditory nerve (the nerve that connects your ears to your brain).
Explain how we see objects using the ray model of light.
Light reflects off objects and travels in straight lines to our eyes.
Explain how current and voltage behave in a parallel circuit.Voltage is the same across all branches; current splits between them.
Voltage is the same across all branches; current splits between them.