34 PRINT : PRINT "BONUS LEVEL IF YOU PASS THE HARD LEVEL."
38 PRINT
40 INPUT "WHICH LEVEL DO YOU WANT TO TRY? ";L
42 IF L < > INT(L) THEN L = 1: GOTO 20
50 IF L <1 OR L >3 THEN L = 1: GOTO 20
60 GOTO 190
100 FOR J = 1 TO 4
110 FOR I = 1 TO 10
120 READ Q$(J,I)
130 FOR K = 1 TO 3
140 READ CH$(J,I,K)
150 NEXT K
160 READ CA$(J,I)
170 NEXT I,J
180 RETURN
190 IF D(L) = 1 THEN PRINT : PRINT "YOU ALREADY DID THAT LEVEL": FOR I = 1 TO 1000: NEXT I: GOTO 20
192 D(L) = 1
200 FOR Z = 1 TO 1500: NEXT Z: FOR I = 1 TO 10
201 HOME
202 IF L = 1 THEN PRINT "EASY LEVEL"
203 IF L = 2 THEN PRINT "AVERAGE LEVEL"
204 IF L = 3 THEN PRINT "HARD LEVEL"
205 IF L = 4 THEN PRINT "BONUS LEVEL"
206 PRINT "QUESTION NUMBER "I: PRINT
210 PRINT Q$(L,I)
215 PRINT
220 FOR K = 1 TO 3
230 PRINT CHR$(64 +K)". "CH$(L,I,K)
235 PRINT
240 NEXT K
250 INPUT "ANSWER HERE: ";A$
260 IF MID$ (A$,1,1) = CA$(L,I) THEN GOTO 300
265 IF MID$ (A$,1,1) < >"A" AND MID$ (A$,1,1) < >"B" AND MID$ (A$,1,1) < >"C" THEN GOTO 250
270 PRINT : PRINT "WRONG! THE ANSWER WAS "CA$(L,I)"."
275 Q(L) = Q(L) +1
277 QT = QT +1
280 GOTO 320
300 PRINT : PRINT "YOU ARE CORRECT!"
310 C(L) = C(L) +1:Q(L) = Q(L) +1
312 QT = QT +1:CT = CT +1
320 PRINT "SO FAR YOU HAVE GOTTEN "C(L)" OUT OF "Q(L): PRINT "QUESTIONS CORRECT AT LEVEL "L: PRINT "AND "CT" OUT OF "QT" CORRECT OVERALL."
325 FOR Z = 1 TO 1500: NEXT Z: REM PAUSE
330 NEXT I
332 IF L = 3 AND C(L) >7 THEN PRINT : PRINT "YOU HAVE PASSED THE HARD": PRINT "LEVEL AND YOU NOW QUALIFY FOR THE ": PRINT "BONUS LEVEL.":L = 4: GOTO 200
336 IF D(1) = 1 AND D(2) = 1 AND D(3) = 1 THEN GOTO 355
340 INPUT "DO YOU WANT TO TRY AGAIN? ";A$
350 IF A$ = "Y" OR A$ = "YES" THEN GOTO 20
355 TL = C(1) +C(2) *2 +C(3) *3 +C(4) *4
357 PRINT "YOU RATED "TL" OUT OF 100."
360 END
10000 REM EASY LEVEL DATA
10010 DATA "THE PLANET THAT WE LIVE ON IS CALLED:","MARS","EARTH","SATURN","B"
10020 DATA "MOST OF THE WHITE SPECKES OF LIGHT IN THE SKY WE SEE AT NIGHT ARE CALLED:","STARS","METEORS","PLANETS","A"
10030 DATA "THE BRIGHT OBJECT IN OUR DAYTIME SKY IS CALLED:","THE EARTH","THE MOON","THE SUN","C"
10040 DATA "THE PLANET WITH A BIG RED SPOT ON IT IS CALLED:","JUPITER","EARTH","MERCURY","A"
10050 DATA "HOW LONG DOES THE EARTH TAKE TO MAKE ONE ROTATION?","72 HOURS","6 HOURS","24 HOURS","C"
10060 DATA "THE PLANET SATURN IS KNOWN MOSTLY FOR:","ITS MOONS","ITS RINGS","ITS TEMPERATURE","B"
10070 DATA "THE PLANET THAT HAD A CARTOON CHARACTER NAMED AFTER IT IS:","MARS","VENUS","PLUTO","C"
10080 DATA "THE PLANET THAT IS ALWAYS COVERED WITH CLOUDS AND IS VERY HOT IS:","MERCURY","VENUS","MARS","B"
10090 DATA "ON JULY 20, 1969 WHAT DID APOLLO 11 LAND ON?","THE MOON","MARS","JUPITER","A"
10100 DATA "EVERY DAY THE MOON EFFECTS WHAT ON THE EARTH?","THE TEMPERATURE","THE WIND","THE TIDES","C"
20000 REM AVERAGE LEVEL DATA
20010 DATA "THE SIXTH PLANET FROM THE SUN IS CALLED:","URANUS","SATURN","NEPTUNE","B"
20020 DATA "WHICH PLANET HAS AN EAST POLE AND A WEST POLE?","MERCURY","NEPTUNE","URANUS","C"
20030 DATA "TITAN IS A SATELLITE OF WHICH PLANET?","SATURN","EARTH","PLUTO","A"
20040 DATA "MARS HAS HOW MANY SATELLITES?","1","2","3","B"
20050 DATA "WHAT IS THE NAME OF OUR STAR?","SIRIUS","SOL","ALTAIR","B"
20060 DATA "THE CLOSEST STAR TO THE EARTH OTHER THAN OUR OWN IS:","BETELGEUSE","ALPHA CENTAURI","PROCYON","B"
20070 DATA "HOW LONG DOES IT TAKE THE PLANET SATURN TO MAKE ONE COMPLETE REVOLUTION AROUND THE SUN?","164.79 YEARS","29.46 YEARS","365.26 DAYS","B"
20080 DATA "HOW MANY PLANETS ARE IN OUR SOLAR SYSTEM?","9","10","7","A"
20090 DATA "WHAT GALAXY ARE WE IN?","ANDROMEDA","MILKY WAY","URSA MAJOR","B"
20100 DATA "SOLAR ECLIPSES ONLY OCCUR:","DURING A FULL MOON","DURING A QUARTER MOON","DURING A NEW MOON","C"
30000 REM HARD LEVEL DATA
30010 DATA "WHICH PLANET ROTATES IN A RETROGRADE MOTION?","MARS","SATURN","VENUS","C"
30020 DATA "WHAT MEASUREMENT OF DISTANCE IS THE GREATEST?","LIGHT YEAR","ASTRONOMICAL UNIT","PARSEC","C"
30030 DATA "THE LOWER THE VISUAL MAGNITUDE OF A STAR THEN:","THE BRIGHTER THE STAR IS","THE DIMMER THE STAR IS","THE DENSER THE STAR IS","A"
30040 DATA "WHICH PLANET HAS THE LARGEST INCLINATIONTO THE ECLIPTIC?","MERCURY","PLUTO","SATURN","B"
30050 DATA "WHICH OF THE FOLLOWING IS A CLASS G STAR?","SIRIUS","ALPHA CENTAURI","ARCTURAS","B"
30060 DATA "WHICH OF THE FOLLOWING STARS IS A RED GIANT?","CAPELLA","BETELGEUSE","SIRIUS","B"
30070 DATA "WHAT IS THE DIFFERENCE BETWEEN A NOVA AND A SUPER NOVA?","A NOVA IS A STAR BLOWING UP AND A SUPER NOVA IS A GALAXY BLOWING UP."
30072 DATA "A NOVA IS WHEN ONLY THE STAR'S OUTER SHELL EXPLODES AWAY AND A SUPER NOVA IS WHEN THE ENTIRE STAR EXPLODES."
30074 DATA "A NOVA IS A PULSATING STAR OF AVERAGE ABSOLUTE VISUAL MAGNITUDE AND A SUPER NOVA IS A PULSATING STAR OF VERY LOW VISUAL MAGNITUDE.","B"
30080 DATA "WHICH STAR HAS THE LOWEST APPARENT VISUAL MAGNITUDE?","VEGA","REGULAS","SIRIUS","C"
30090 DATA "HOW FAR FROM OUR SUN IS A STAR MEASURED FOR ABSOLUTE VISUAL MAGNITUDE?","1 PARSEC","10 PARSECS","20 LIGHT YEARS","B"
30100 DATA "WHAT IS A BOLIDE?","A BINARY STAR","A VERY LOUD AND VERY BRIGHT METEOR","A TYPE OF MOON ROCK","B"
40000 REM BONUS LEVEL DATA
40010 DATA "WHICH OF THE FOLLOWING DO NOT GO TOGETHER?","TROPOSPHERE","CHROMOSPHERE","PHOTOSPHERE","A"
40020 DATA "WHAT IS THE MAXIMUM NUMBER OF ECLIPSES, SOLAR AND LUNAR, THAT CAN EVER OCCUR IN ONE YEAR?","5","6","7","C"
40030 DATA "WHAT IS THE MAXIMUM DIAMETER OF THE MOON'S UMBRA THAT CAN BE ON THE EARTH'S SURFACE DURING A TOTAL SOLAR ECLIPSE?","79.5 MILES","167 MILES","145 MILES","B"
40040 DATA "WHAT IS THE PERIOD OF THE PRECESSION OF THE EQUINOXES?","20,000 YEARS","26,000 YEARS","42,000 YEARS","B"
40050 DATA "WHO PROPOSED THE HELIOCENTRIC CONCEPT OF THE SOLAR SYSTEM?","CLAUDIS PTOLEMY","NICOLAUS COPERNICUS","CARL SAGAN","B"
40060 DATA "THERE ARE TWO KNOWN WORLDS TO BE CURRENTLY VOLCANICALLY ACTIVE. ONE IS THE EARTH. WHAT IS THE OTHER?","IO","MARS","MIMAS","A"
40070 DATA "THIS SATELLITE HAS THE ONLY KNOWN ATMOSPHERE IN OUR SOLAR SYSTEM. THE SATELLITE IS CALLED:","TITAN","GANYMEDE","DEIMOS","A"
40080 DATA "ORBITING AROUND THE SUN IN JUPITER'S ORBIT, 60 DEGREES IN FRONT AND 60 DEGREES BEHIND JUPITER, ARE TWO GROUPS OF ASTEROIDS. WHAT IS THE NAME OF THIS GROUP OF ASTEROIDS?","CERES","EROS","TROJAN","C"
40090 DATA "WHEN DOES A COMET'S TAIL TRAIL AWAY FROM THE SUN?","ON ITS WAY TOWARDS THE SUN.","ON ITS WAY AWAY FROM THE SUN.","IT ALWAYS TRAILS ITS TAIL AWAY FROM THE SUN.","C"
40100 DATA "WHAT IS THE ORBITAL VELOCITY OF THE EARTH?","18.5 MILES PER SECOND","16 MILES PER SECOND","27.5 MILES PER SECOND","A"