Skills
The boiling point of milk is 90oC.
This statement is an example of a
a) Conclusion
b) Aim
c) Hypothesis
c) Hypothesis
Consists of two or more different atoms that have formed bonds (ionically or covalently).
a) Element
b) Compound
c) Mixture
b) Compound
Hormones are released
a) between neuron axons
b) into the bloodstream
c) by the bone marrow
b) into the bloodstream
Complete the sentence.
The __________ system carries ner_______ impulses to and from the br________ and sp________c_________.
The nervous system carries nerve impulses to and from the brain and spinal cord.
The smallest subatomic particle is the
a) Electron
b) Proton
c) Neutron
In a FAIR TEST all the factors are kept constant except the
a) Dependent variable
b) independent variable
b) Independent variable
The atomic number for SODIUM (Na) is 11.
This number gives the number of;
a) ONLY Neutrons
b) ONLY Electrons
c) Electrons/Protons
d) ONLY Protons
c) Atomic number = Electron/Proton numbers
The Nervous system is divided into the CENTRAL NERVOUS SYSTEM (CNS) and the PREPHERAL NERVOUS SYSTEM (PNS).
CNS is composed of the following two components.
CENTRAL NERVOUS SYSTEM
Brain
Spinal cord
Identify the two types of white blood cells that form the Second Line of Defense.
PH____________ and LYMPH_____________
Second Line of Defense
White Blood Cells (WBC)
- Phagocytes
- Lymphocytes
The causative agent for COVID-19 is a
a) Bacteria
b) Fungi
c) Protozoa
d) Virus
The causative agent for COVID-19 is a
d) Virus
To determine the time taken for two types of parachutes to fall from a height of 10 meters.
a) Give a hypothesis
b) Identify the independent and dependent variables
c) Identify the control variable
To determine the time taken for two types of parachutes to fall from a height of 10 meters.
HYPOTHESIS
The fall time for the paper parachute will be less than the foil parachute.
INDENPENDENT VARIABLE - Foil and paper parachute
DEPENDENT VARIABLE - Fall time
CONTROL VARIABLE/CONSTANTS
Size of parachute / Height of fall etc.
Glucose C2 H12 O6
Identify the type and number of each element in glucose.
Glucose C2 H12 O6
2 CARBON
12 HYDROGEN
6 OXYGEN
Identify three components of the first line of defense.
ANY of the following THREE;
- Skin
- Mucous
- Cilia
- Nasal hairs
- Sweat
- Tears
Uranium-238 is a radioisotope which emits radiation due to its unstable ________________
Nucleus
Identify the hormones produced by each of the following glands;
a) Pituitary gland
b) Pancreas
c) Ovaries
a) Pituitary gland - growth hormone
b) Pancreas - insulin
c) Ovaries - oestrogen and progesterone
The burning time for one, two and three candles was taken.
a) Identify the independent variable
b) Identify the dependent variable
c) If you constructed a graph, indicate what would be placed along the X (horizontal) axis and the Y (vertical) axis.
The burning time for one, two and three candles was taken.
a) Identify the independent variable
NUMBER OF CANDLES
b) Identify the dependent variable
BURNING TIME
c) If you constructed a graph, indicate the
X (horizontal) axis - Number of candles
Y (vertical) axis - Burning time
Aluminum has an atomic number of 13 and an atomic mass of 26.9
1) Give the number of electrons/protons
2) Give the number of neutrons
3) Give the electron configuration
Aluminium
1) Electrons/Protons = Atomic number = 13
2) Neutrons = 26.9 - 13 = 14
3) Electron configuration 2, 8, 3
Each year we are vaccinated against the INFLUENZA virus.
Give two reason(s) why we need to be immunised annually against this disease.
1) Rebuild the bodies diminishing antibodies reserves.
2) To combat new mutant strains of the influenza virus.
Chlorine has an atomic number of 17 and an atomic mass of 35.45
1) Give the number of electrons/protons
2) Give the number of neutrons
3) Give the electron configuration
1) Electrons/protons = 17
2) Neutrons = 35.45 - 17
= 18
3) Give the electron configuration
2, 8, 7
Neuron consists of the following parts. Outline the function of each part.
Myelin sheath
Dendrite
Axon terminal
Myelin sheath - ensure nerve signals pass down the neuron.
Dendrite - receives signals from other cells.
Axon terminal - releases neurotransmitters that relay signals across a synapse.
Identify factors that need to be present to ensure results are valid.
-Repetition (reliability)
-Quantities measured accurately
- Control variable/all factors are kept constant except the independent variable
- ONE independent variable is present
Distinguish between J.J Thompsons Plum Pudding model and Rutherfords model of the atom.
Plum pudding model
- Positively charged atom with electrons dispersed throughout it.
Rutherford's findings changed our structural understanding of the atom. Through the Gold Foil experiment, Rutherford was able to show that most of the atom was empty space with the center consisting of a positively charged nucleus.
Distinguish between PASSIVE and ACTIVE IMMUNITY.
Active Immunity
Immunity your body develops after getting an infection or vaccination.
Passive immunity
The body does not initiate an immune response to produce immune cells such as antibodies rather they are introduced when a baby acquires them from their mother or intravenously through an immune serum.
What distinguishes a MOTOR NEURON from a SENSORY NEURON
Motor neurons are found in our muscles and sensory neurons are present in our sense organs.
The cell body is in the middle for a sensory neuron at the top for a sensory neuron.
Helium and Neon are in the same group or column this means they have.....
Similar properties and reactivities
They are both inert (non reactiive) noble gases.