Cell and Cell Organelles
Which organelle controls cell activities?
Nucleus
What is the path through which electric current flows called?
Electric circuit
Which subatomic particle has a negative charge?
Electrons
What is anything that has mass and occupies space called?
Matter
What is the SI unit of force?
Newton
Which type of transport requires energy?
Active Transport
What is the unit of potential difference?
Volt ( V )
What is the charge of an atom that has equal numbers of protons and electrons?
Neutral
Is water, H₂O, an element or a compound?
Compound
Why does a sharp knife cut more easily than a blunt knife?
Small area means more force and pressure
Which organelle carries out photosynthesis in plant cells?
Chloroplast
What is the negative terminal of a typical dry cell made from?
Zinc
What is the atomic number of an element equal to?
Number of Protons
What type of mixture has uniformly distributed components?
Homogeneous mixture
What do we call the tendency of an object to resist a change in its state of motion?
Inertia
What happens to a cell placed in a hypertonic solution?
It loses water and shrinks
Temporary Magnets are called----
Electromagnets
What is the valency of a noble gas with a complete outer shell?
0
In sugar dissolved in water, what is the solvent?
Water
Magnetic Force is which type of force?
Non-Contact Force
Two types of Osmosis ?
Exosmosis, Endosmosis
Acid used in Lead Acid Battery
Sulfuric Acid (H2SO4)
Which model described the atom as a positively charged sphere with electrons embedded in it?
Thomson’s plum pudding model
What is the scattering of light by colloidal particles called?
Tyndall effect
A 30 N force acts right and a 10 N force acts left. What is the net force?
20 N to the right